Plant Overviewcanesbio.pbworks.com/w/file/fetch/116568843/22-25... · together to produce a diploid...
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Plant Overview
Chapters 22-25
I. Plant Diversity
A. What is plant?
1. Eukaryotic, multicellular, photosynthetic
autotroph with cell walls of cellulose
2. Carry out photosynthesis using chlorophyll a and b
3. Trees, shrubs, grasses
B. Life Cycle
1. Alternation of Generation
a. Haploid (n) gametophyte, gamete producing
plant
1) gametes, egg and sperm, haploid that fuse
together to produce a diploid individual
b. Diploid (2N) sporophyte, spore producing
plant
1) Spores are reproductive cells that produce
a new individual by mitosis
c. All plants have a gametophyte and a
sporophyte stage
The Plant Life Cycle
Alternation of
Generations
Page 552
Evolutionary Relationships Among Plants
Flowering plants
Cone-bearing plants
Ferns and
their relativesMosses and
their relatives
Flowers; Seeds
enclosed in fruit
Water-conducting (vascular)
tissue
Seeds
Green
algae
ancestorPage 554
C. Early Plants
1. 1st plant evolved from an organism like
multicellular green algae
D. Major Groups
1. Mosses (bryophyta)-Seedless-nonvascular
2. Ferns (pterophyta)-seedless vascular
3. Cone-bearing (gymnosperms)-seed, vascular,
cones
4. Flowering (angiosperms)-seeds, vascular,
flowers/ fruit
II. Plant Adaptations
A. Nonvascular plants
1. Use osmosis/diffusion for water and
nutrient transport
B. Vascular Plants-named after vascular tissue
1. Formed from tubes that conduct
materials through plants
a. Xylem = transports water and minerals
upward from roots to rest of plant
b. Phloem = transports sugar from leaves to
rest of plant
2. Capillary Action
tendency for
water to rise in a thin
tube due to cohesion
(water to water)and
adhesion (water to
attracted to another
compound/ surface)
in tubes like xylem
Page 599
Vascular Tissue
Xylem Phloem
Tracheid
Vessel element
Companion cell
Sieve tube element
Page 581
C. Cuticle
1. Waxy, waterproof coating – prevents water loss
Cuticle
D. Leaf
1. Trap light energy – primary site of photosynthesis
2. Upper/lower side of leaf = epidermis
3. Stomata = opening on underside of leaf that
allows CO2 in and O2 out and transpiration
4. Guard Cells = open and close the stomata
5. Vein = bundles of vascular tissue
6. Deciduous trees- drop leaves
Evergreens – long needles to reduce surface area for
transpiration/branches flexible to bend instead of break
under weight of ice and snow
Leaf Structure
Epidermis
Cuticle
Phloem
Xylem
Stoma
Guard cells
Vein
Epidermis
Page 596 and 597
1. Stomata- pores in cuticle that allow for oxygen out / CO2 in; also
transpiration (evaporation of water through stomata); surrounded by
2. guard cells-open and close stoma
3. Layers of leaves: upper/ lower epidermis, then
mesophyll- (“middle filling”)- photosynthetic tissue in center of leaf;
2 types of mesophyll:
a. Palisade mesophyll-long, columnar cells w/ many
chloroplasts, top side of leaf
b. Spongy mesophyll- loosely packed cells w/ air holes for gas
exchange w/ through stomata, lower side of leaf
4. Vascular bundles (make up veins in leaf)- contain xylem and phloem
in a protective sheath
Leaf Structure:
Root
hairs
Epidermis
Ground
tissue
(cortex)
Vascular cylinder
Xylem
Phloem
Apical meristem
Root cap
E. Roots
1. Obtain nutrients/water
from soil, anchor plant
to ground, storage (some
store extra starch – ex.
Carrots)
2. Root Cap – tough,
protective, and waxy
roots push through soil
without being damaged
3. Root Hairs – extensions that increase the
surface area of roots to increase the absorption
of water
Page 585
4. Two types
a. Taproot – primary root, long and thick,
stores sugars and starches (carrot)
b. Fibrous Root – no single root grows larger
than the rest, branches out (grasses)
Page 584
Bud Node
Node
Internode
F. Stem
1. Support
leaves/transport water
and food/storage to
survive long winters
and drought
2. Herbaceous (green) vs.
Woody (brown)
3. Cork Cambium – forms
outer covering of bark
4. Annual growth rings – xylem
cellsPage 589
G. Reproduction and Growth Patterns
1. Alternation of Generation
a. Plants will alternate between the two forms
or structures: haploid and diploid structures
2. Primary Growth
a. All plants at apical meristems - lengthens
plant at tips of stems and roots
3. Secondary Growth
a. Widens plant (girth) occurs in many
plants – occurs at vascular cambium
Vascular cambiumSecondary xylem
Secondary phloem
Page 591
Wood
Bark
HeartwoodSapwood
Vascular
cambium
Phloem
Cork
Wood Formation
Wood is actually
layers of xylem.
These cells build
up year after year
Page 593
4. Internal Structure
of Seeds
a. Seeds may go
dormant in
unfavorable
conditions
Ex. drought –
when rains
come
germination
Page 565
A. Nonvascular Plants (Bryophta)
1. Mosses and relatives
a. Depend on osmosis to take in water
because no vascular tissue
b. Depend on water for reproduction;
sperm have to swim to the egg
c. No roots, have rhizoids = long thin cells
that anchor them to the ground
III. Types of Plants
Groups of Bryophytes
The Structure
of a Moss
Stalk
Capsule
Sporophyte
Gametophyte
Stemlike
structure
Leaflike
structure
Rhizoid
Page 557
B. Seedless Vascular Plants
(Pterophyta - Ferns)
1. Frond – leaf with pinnae
(leaflets)
2. Sori – produce spores on
underside of frond
3. Rhizome – underground
stems – gives rise to frondsPage 562
C. Seed Plants (Two Groups)
1. Gymnosperms
(Cone-bearing Plants)
a. Seeds on cone surface
b. Groups – conifers, gnetophytes, cycads, and
ginkgoes
c. Seeds dispersed by wind – germinate to
form seedling
Page 567
2. Angiosperms (Flowering Plants)
a. Youngest, most diverse phlyum
b. Unique reproductive structure = FLOWER
1) Sepal – outermost leaves
2) Petals – brightly colored to attract insects
3) Stamen – male part filament and anther
– pollen grain
4) Carpel (pistil) – female part stigma, style,
ovary
Ovary
Ovule
Carpel Style
Stigma
Ovary
Filament
AntherStamen
Complete Flower- 4 whorls present
Sepal
Petal
Basic Structure of Flower
Page 612
Ovary
Ovule
Carpel Style
Stigma
Ovary
Filament
AntherStamen
Complete Flower- 4 whorls present
Sepal
Petal
Basic Structure of Flower
Page 612
A B
C D
E
F
G
HI
J
K
2) Seeds within a layer of tissue that protects the
seed fruit ripened ovary
c. Reproduction
1) Pollen grain lands on stigma, pollen tube
grows into style, reaches ovary and fertilizes
ovule
i. Fruit used for attraction to be eaten/dispersal
d. Split into 2 groups
1) Monocots (monocotyledon – 1 seed leaf) and
Dicots (dicotyledon – 2 seed leaves)
Page 570
2) Monocots- leaves w/ parallel veins, fibrous roots,
stems have vascular bundles spread evenly
throughout (“chocolate chip cookie”); flower parts-
multiples of 3; grasses, orchids, palms, corn
3) Dicots-leaves w/ branching “net-like” veins,
taproot system; stems have vascular bundles
arranged as an outer ring (“pizza slices”); flower
parts-multiples of 4 or 5; shrubs, fruit trees,
flowers, herbs
Dicot stem Monocot Stem
e. Flower Cycles
1) Annuals - Grow, flower and die in one year
(pansies, zinnas)
2) Biennials -Live for two years, flower during
the second year (primrose,
carrots, beets, radishes)
3) Perennials -Live for several years; produce
flowers/seeds periodically (fruit
trees, grasses, oak, maple)
IV. Plant Responses
A. Tropisms – growth towards a stimulus (+ tropism)
or away from a stimulus (- tropism)
1. Geotropism – (aka gravitropism) – growth
towards the pull of gravity
2. Hydrotropism – growth towards water
3. Phototropism – growth towards light
4. Thigmotropism – growth due to touch (vines
growing on a wall)
B. Nastic Response aka: Rapid Response
1. Immediate response to a stimulus
Ex. Venus Flytrap closing; Mimosa leaves
folding up when disturbed
Thigmotropism Nastic response
C. Photoperiodism-response of flowering plants to length of
night; caused by phytochromes
D. Circadian rhythms-behavior cycles that are on a 24-hr.
cycle; leaves/ flowers folding at night and opening during
day
1. short day (pansies, poinsettias, mums)
3. day-neutral-many species flower over range of
photoperiods (roses, tomatoes, beans)
2. long day plants (potato, petunia, carnation, pea,
spinach, clover, iris)
E. Chemical Defenses-Secondary compounds
1. compounds are lethal when eaten by the predator or
may cause irritation (poison ivy)
2. compounds similar to insect hormones so that predator
cannot reproduce
3. compounds released in soil so that other plants cannot
grow in the same area
4. compounds affect nervous system of insect acting as
pesticide ex: nicotine- tobacco plants
Plant Tissue SystemsLeaf
Stem
Root
F. Specialized Plants
1. Aquatic plants-structures w/ air spaces to get oxygen
(Mangroves, water lilies, “knees” of Cypress trees)
2. Salt-tolerant plants (Mangroves)- cells pump salt to leaf
surface, washed away by rain
3. xerophytes- desert plants- roots = deep or shallow for
long distances, reduced leaves, stems store water; ex: cacti
4. Carnivorous plants- supplement diet and inc. nitrogen
intake
5. Parasitic- extract water/ nutrients from host; ex: dodder;
mistletoe
6. Epiphytes- grow on other plants, but do not harm; ex:
Spanish moss; orchids
Aquatic
Plants
Mangroves are aquatic
and salt-tolerant
Mangrove roots
Water lilies
Cypress trees and knees
Zebra plant Cactus
Xerophytes
Carnivorous Plants
Echeveria
Epiphytes
Movement
of a
hormone
in a plant
G. Hormone: chemical messenger that is produced in one
part of an organism and effects change in another
part
1. Auxin – responsible for phototropism by stimulating
cell elongation
a. Cells on dark side
will elongate allowing
the stem to bend
towards the light
b. Promotes growth of
fruit and minimizes the
falling off of fruit
Auxin levels drops; ethylene
increases, ripened fruit and leaves
“fall”
2. Gibberellins- grow taller, increase rate of seed germination
and bud development
3. Abscisic Acid – inhibit plant growth and cell division
during times of stress/cold/drought
Pitcher plant- carnivorous plant;
can grow in low nitrogen soil b/c
Supplements diet with ants!
22–1
Most plants alive today are
A. cone-bearing.
B. flowering.
C. ferns.
D. mosses.
22–1
The two phases of a plant's life cycle
are referred to as
A. alternation of generations.
B. spontaneous generation.
C. biogenesis.
D. sexual and asexual.
22–1
Which statement accurately describes a way that plants meet their basic needs?
A. Plants take in carbon dioxide from soil through their roots.
B. Plants obtain the energy for photosynthesis from sunlight.
C. Plants obtain minerals by exchanging gases with the atmosphere.
D. Plants absorb water through their broad, flat leaves.
22–1
The first group of plants to evolve
from green algae were the
A. cone-bearing plants.
B. ferns.
C. mosses.
D. flowering plants.
22–1
The diploid phase of the plant life
cycle is known as the
A. sporophyte.
B. gametophyte.
C. egg.
D. spore.
22–2
Unlike all other plants, bryophytes do
NOT have
A. vascular tissue.
B. chlorophyll.
C. gemmae.
D. cell walls.
22–2
Water moves from the soil into the stemlike and leaflike structures of bryophytes by
A. osmosis.
B. active transport.
C. specialized conducting structures.
D. vascular tissue.
22–2
The most abundant bryophytes are the
A. liverworts.
B. mosses.
C. hornworts.
D. ferns.
22–2
Fertilization in bryophytes is
dependent upon the presence of
A. water.
B. sunlight.
C. nutrients.
D. wind.
22–2
The stage of a moss plant that carries
out most photosynthesis is the green
A. gametophyte.
B. sporophyte.
C. protonema.
D. zygote.
22–3
Plant cells specialized to conduct
water are called
A. tracheids.
B. veins.
C. sori.
D. phloem.
22–3
The presence of vascular tissue
enables a plant to
A. carry on photosynthesis.
B. carry on lactic acid fermentation.
C. conduct water and nutrients.
D. make chlorophyll.
22–3
Ferns are different from mosses because they
A. carry out photosynthesis using chlorophyll.
B. have vascular tissue to conduct water and nutrients.
C. help expose more of the plant’s surface area to sunlight.
D. exchange carbon dioxide and oxygen with the atmosphere.
22–3
Club mosses and horsetails are similar
to ferns because they have
A. vascular tissue.
B. seeds.
C. sori.
D. fronds.
22–3
When fern spores germinate, they
develop into
A. diploid gametophytes.
B. haploid gametophytes.
C. haploid sporophytes.
D. diploid sporophytes.
22–4
All of the following are adaptations that allow seed plants to reproduce without water EXCEPT
A. transfer of sperm by pollination.
B. production of spores.
C. protection of embryos in seeds.
D. supplying embryos with food.
22–4
The early developmental stage of the sporophyte in seed plants is known as the
A. seed coat.
B. seed.
C. embryo.
D. endosperm.
22–4
Which of the following is a water-
conserving adaptation in conifers?
A. presence of cones
B. long, thin needles
C. no vascular tissue in the leaves
D. seed coats
22–4
Each species of seed plant reproduces
by means of
A. cones only.
B. flowers only.
C. both cones and flowers.
D. either cones or flowers.
22–4
The group of gymnosperms having the
greatest number of species are the
A. gnetophytes.
B. conifers.
C. cycads.
D. ginkgoes.
22–5
One function of angiosperm fruit is to
A. distract animals from eating the rest
of the plant.
B. provide extra food for the seeds.
C. attract animals to eat the fruit and
spread seeds.
D. store food for use by the plant.
22–5
Flowers are specialized structures in angiosperms that
A. have ovaries that surround and protect the seeds.
B. attract animals to eat the flowers instead of the plant.
C. are the site of asexual reproduction for the plant.
D. make toxins to protect seeds developing inside the flower.
22–5
Angiosperms that have one seed leaf are classified as
A. biennials.
B. monocots.
C. dicots.
D. annuals.
22–5
Which of the following is a
characteristic of monocots?
A. branched veins
B. parallel veins
C. taproots
D. seed with two cotyledons
22–5
Flowering plants that live for more
than two years are called
A. biennials.
B. annuals.
C. perennials.
D. shrubs.
23–1
The principle organs of seed plants are
A. reproductive organs and photosynthetic organs.
B. stems, leaves, and flowers.
C. roots, vessels, and cones.
D. leaves, stems, and roots.
23–1
Phloem cells that surround sieve tube
elements are called
A. epidermal cells.
B. cuticle cells.
C. companion cells.
D. vessel elements.
23–1
Which type of ground tissue has thin cell walls and large central vacuoles?
A. parenchyma
B. collenchyma
C. sclerenchyma
D. tracheids
23–1
Cells that can differentiate into many
plant tissues are found in
A. the vascular cylinder.
B. dermal tissue.
C. meristematic tissue.
D. ground tissue.
23–1
When cells in the apical meristem first develop, they are
A. highly specialized and divide often.
B. unspecialized and divide rarely.
C. highly specialized and divide rarely.
D. unspecialized and divide often.
23–2
Taproots are more common than
fibrous roots in
A. monocots.
B. dicots.
C. neither monocots or dicots.
D. both dicots and monocots.
23–2
The cells in a root that divide are
found in the
A. apical meristem.
B. epidermis.
C. endodermis.
D. vascular cylinder.
23–2
The tough layer of cells that covers the
root tip is called the
A. vascular cylinder.
B. root cap.
C. ground tissue.
D. apical meristem.
23–2
Xylem and phloem are found in the
A. epidermis.
B. endodermis.
C. apical meristem.
D. vascular cylinder.
23–2
Roots absorb minerals from the
surrounding soil by
A. diffusion.
B. active transport.
C. passive transport.
D. root pressure.
23–3
Structures on a stem that can produce
new stems and leaves are called
A. nodes.
B. internodes.
C. buds.
D. branches.
23–3
The vascular bundles in a monocot stem
A. form a cylinder, or ring.
B. are scattered throughout the stem.
C. form concentric rings.
D. separate into xylem bundles and phloem bundles.
23–3
The outermost layer of a tree that contains old, nonfunctioning phloem is
A. bark.
B. cork.
C. pith.
D. apical meristem.
23–3
Xylem and phloem are contained in
A. the epidermis.
B. vascular bundles.
C. the pith.
D. cork cambium.
23–3
In stems, secondary growth results in
A. growth at the tips of roots.
B. growth at the tips of shoots.
C. an increase in the width of stems.
D. an increase in the length of
stems.
23–4
A compound leaf is one that has
A. a blade attached by several petioles.
B. two or more blades.
C. a blade that is divided into many leaflets.
D. many blades, each with its own petiole.
23–4
The layer of cells in a leaf that absorb
light is the
A. phloem.
B. vein.
C. palisade mesophyll.
D. epidermis.
23–4
The structure of a leaf allows it to
A. maximize sun exposure and maximize water loss.
B. maximize sun exposure and minimize water loss.
C. minimize sun exposure and maximize water loss.
D. minimize sun exposure and minimize water loss.
23–4
A process in which water is lost through the leaves of a plant is called
A. transpiration.
B. photosynthesis.
C. glycolysis.
D. cellular respiration.
23–4
Gas exchange in a leaf occurs through
the
A. cuticle.
B. epidermis.
C. mesophyll.
D. stomata.
23–5
In a plant stem, water moves from
A. leaves to roots through xylem.
B. roots to leaves through xylem.
C. leaves to roots through phloem.
D. roots to leaves through phloem.
23–5
Which of the following is NOT involved in the movement of water in xylem tissue?
A. cohesion
B. osmosis
C. capillary action
D. adhesion
23–5When nutrients are pumped into the
phloem system of a plant, the increased concentration
A. causes fluid to move into the system.
B. causes fluid to move out of the system.
C. has no effect on the movement of fluid.
D. causes fluid to move into the xylem vessels.
23–5
In a plant, sugar is moved from source
cells to sink cells by a process of
A. phloem transport.
B. xylem transport.
C. osmosis.
D. diffusion.
23–5
In very tall trees, which of the
following is primarily involved in
moving water to the top of the tree?
A. transpirational pull
B. capillary action
C. root pressure
D. osmosis
24–1
In a gymnosperm, fertilization occurs
inside the
A. ovule.
B. pollen tube.
C. seed cone.
D. pollen cone.
24–1
The pollen-producing structure of
angiosperms is the
A. stigma.
B. carpel.
C. anther.
D. sepal.
24–1
In an angiosperm, a structure that
results from fertilization is the
A. female gametophyte.
B. pollen grain.
C. zygote.
D. ovary.
24–1
Which term applies to the chromosome number of a seed plant embryo?
A. haploid
B. diploid
C. triploid
D. polyploid
24–1
Pollination in most gymnosperms and
some angiosperms is carried out by
A. water transport.
B. insects.
C. wind.
D. birds and bats.
24-2
A germinating corn seedling has
A. a single cotyledon, which remains below ground.
B. two cotyledons, which push above ground.
C. a single cotyledon, which pushes above ground.
D. two cotyledons, which remain below ground.
24-2
Angiosperm fruits develop from
A. the ovary wall of the flower.
B. seed endosperm.
C. swollen sepals of the flower.
D. flower stamens.
24-2
An example of a seed that is
transported by water is a
A. coconut.
B. tumbleweed.
C. blackberry.
D. maple seed.
24-2
The seeds of many plants that form
fruits are dispersed mainly by
A. animals.
B. water.
C. wind.
D. the plant itself.
24-2
An environmental condition that can cause the activation of a dormant seed is
A. a sharp drop in temperature.
B. the heat from a forest fire.
C. an extended drought.
D. falling from a great height.
24-3
Which of the following is a method of
vegetative reproduction?
A. pollination
B. seed dispersal
C. plantlet production
D. fertilization
24-3
Long, trailing stems that can produce
roots are called
A. scions.
B. stolons.
C. cuttings.
D. buds.
24-3
In order to propagate a plant by
cuttings, the cuttings must include
A. roots, stems, and leaves.
B. xylem and phloem.
C. meristematic tissue.
D. ground tissue.
24-3
The process in which a stem is used as
a scion is called
A. grafting.
B. budding.
C. stock.
D. stolon.
24-3
Crops used as food by the bulk of the world include all of the following EXCEPT
A. corn.
B. wheat.
C. rice.
D. potatoes.
25–1
The tendency of a plant to grow
toward a source of light is
A. gravitropism.
B. phototropism.
C. meristematic growth.
D. apical dominance.
25–1
A plant part in which hormones are
produced is
A. the apical meristem.
B. a target cell.
C. a hormone receptor.
D. xylem.
25–1
If you snip off the tip of a stem, the
A. plant grows tall and narrow.
B. plant dies.
C. side branches begin to grow
more quickly.
D. stem stops growing.
25–1
Ethylene is a plant hormone that
causes
A. plant cells to grow longer.
B. flowers to develop.
C. fruit to ripen.
D. roots to grow downward.
25–1
The herbicides produced by chemists
have a structure that is similar to
A. auxins.
B. gibberellins.
C. cytokinins.
D. ethylene.
25–2
The rapid (nastic) responses of plants such as the Venus flytrap are caused by changes in
A. light levels.
B. osmotic pressure.
C. temperature.
D. moisture.
25–2
The timing of seasonal activities in plants, such as flowering and growth, depends on
A. gravitropism.
B. thigmotropism.
C. photoperiodism.
D. phototropism.
25–2
The hormone primarily responsible for causing plants to flower depending on the length of the day is
A. auxin.
B. phytochrome.
C. cytokinin.
D. ethylene.
25–2
In most flowering plants, the coming of autumn is marked by
A. a decrease in ethylene production.
B. an increase in auxin production.
C. the production of new plant pigments.
D. a rapid growth spurt.
25–2
In deciduous plants, the process of dormancy involves
A. maintaining photosynthesis and storing material in the roots.
B. turning photosynthesis off and storing material in the roots.
C. maintaining photosynthesis and bringing material up from the roots.
D. turning photosynthesis off and bringing material up from the roots.
25-3
Carnivorous plants trap animals and
digest them, releasing needed
A. water.
B. sugars.
C. nitrogen.
D. oxygen.
25-3
An example of a plant that is a
xerophyte is a
A. cactus.
B. water lily.
C. pitcher plant.
D. mistletoe.
25-3
Salt-tolerant plants remove excess salt absorbed through their roots by the process of
A. diffusion.
B. osmosis.
C. active transport.
D. dilution.
25-3
An example of a carnivorous plant is a
A. mistletoe.
B. Venus' flytrap.
C. Spanish moss.
D. foxglove.
25-3
An example of a plant’s chemical defense is a substance that
A. disrupts insect reproduction.
B. removes excess salt.
C. enables plants to digest insects.
D. absorbs water without using root hairs.
22–1
Most plants alive today are
A. cone-bearing.
B. flowering.
C. ferns.
D. mosses.
22–1
The two phases of a plant's life cycle
are referred to as
A. alternation of generations.
B. spontaneous generation.
C. biogenesis.
D. sexual and asexual.
22–1
Which statement accurately describes a way that plants meet their basic needs?
A. Plants take in carbon dioxide from soil through their roots.
B. Plants obtain the energy for photosynthesis from sunlight.
C. Plants obtain minerals by exchanging gases with the atmosphere.
D. Plants absorb water through their broad, flat leaves.
22–1
The first group of plants to evolve
from green algae were the
A. cone-bearing plants.
B. ferns.
C. mosses.
D. flowering plants.
22–1
The diploid phase of the plant life
cycle is known as the
A. sporophyte.
B. gametophyte.
C. egg.
D. spore.
22–2
Unlike all other plants, bryophytes do
NOT have
A. vascular tissue.
B. chlorophyll.
C. gemmae.
D. cell walls.
22–2
Water moves from the soil into the stem like and leaf like structures of bryophytes by
A. osmosis.
B. active transport.
C. specialized conducting structures.
D. vascular tissue.
22–2
The most abundant bryophytes are the
A. liverworts.
B. mosses.
C. hornworts.
D. ferns.
22–2
Fertilization in bryophytes is
dependent upon the presence of
A. water.
B. sunlight.
C. nutrients.
D. wind.
22–2
The stage of a moss plant that carries
out most photosynthesis is the green
A. gametophyte.
B. sporophyte.
C. peritonea.
D. zygote.
22–3
The presence of vascular tissue
enables a plant to
A. carry on photosynthesis.
B. carry on lactic acid fermentation.
C. conduct water and nutrients.
D. make chlorophyll.
22–3
Ferns are different from mosses because they
A. carry out photosynthesis using chlorophyll.
B. have vascular tissue to conduct water and nutrients.
C. help expose more of the plant’s surface area to sunlight.
D. exchange carbon dioxide and oxygen with the atmosphere.
22–3
Club mosses and horsetails are similar
to ferns because they have
A. vascular tissue.
B. seeds.
C. sore.
D. fronds.
22–3
When fern spores germinate, they
develop into
A. diploid gametophytes.
B. haploid gametophytes.
C. haploid sporophytes.
D. diploid sporophytes.
22–4
The early developmental stage of the sporophyte in seed plants is known as the
A. seed coat.
B. seed.
C. embryo.
D. endosperm.
22–4
Which of the following is a water-
conserving adaptation in conifers?
A. presence of cones
B. long, thin needles
C. no vascular tissue in the leaves
D. seed coats
22–4
Each species of seed plant reproduces
by means of
A. cones only.
B. flowers only.
C. both cones and flowers.
D. either cones or flowers.
22–4
The group of gymnosperms having the
greatest number of species are the
A. geophytes.
B. conifers.
C. cycads.
D. ginkgoes.
22–5
One function of angiosperm fruit is to
A. distract animals from eating the rest
of the plant.
B. provide extra food for the seeds.
C. attract animals to eat the fruit and
spread seeds.
D. store food for use by the plant.
22–5
Flowers are specialized structures in angiosperms that
A. have ovaries that surround and protect the seeds.
B. attract animals to eat the flowers instead of the plant.
C. are the site of asexual reproduction for the plant.
D. make toxins to protect seeds developing inside the flower.
22–5
Angiosperms that have one seed leaf are classified as
A. biennials.
B. monocots.
C. dicots.
D. annuals.
22–5
Which of the following is a
characteristic of monocots?
A. branched veins
B. parallel veins
C. taproots
D. seed with two cotyledons
22–5
Flowering plants that live for more
than two years are called
A. biennials.
B. annuals.
C. perennials.
D. shrubs.
23–1
The principle organs of seed plants are
A. reproductive organs and photosynthetic organs.
B. stems, leaves, and flowers.
C. roots, vessels, and cones.
D. leaves, stems, and roots.
23–2
Taproots are more common than
fibrous roots in
A. monocots.
B. dicots.
C. neither monocots or dicots.
D. both dicots and monocots.
23–2
The cells in a root that divide are
found in the
A. apical meristem.
B. epidermis.
C. endodermis.
D. vascular cylinder.
23–2
The tough layer of cells that covers the
root tip is called the
A. vascular cylinder.
B. root cap.
C. ground tissue.
D. apical meristem.
23–2
Xylem and phloem are found in the
A. epidermis.
B. endodermis.
C. apical meristem.
D. vascular cylinder.
23–2
Roots absorb minerals from the
surrounding soil by
A. diffusion.
B. active transport.
C. passive transport.
D. root pressure.
23–3
Structures on a stem that can produce
new stems and leaves are called
A. nodes.
B. internodes.
C. buds.
D. branches.
23–3
The vascular bundles in a monocot stem
A. form a cylinder, or ring.
B. are scattered throughout the stem.
C. form concentric rings.
D. separate into xylem bundles and phloem bundles.
23–3
The outermost layer of a tree that contains old, nonfunctioning phloem is
A. bark.
B. cork.
C. pith.
D. apical meristem.
23–3
Xylem and phloem are contained in
A. the epidermis.
B. vascular bundles.
C. the pith.
D. cork cambium.
23–3
In stems, secondary growth results in
A. growth at the tips of roots.
B. growth at the tips of shoots.
C. an increase in the width of stems.
D. an increase in the length of
stems.
23–4
A compound leaf is one that has
A. a blade attached by several petioles.
B. two or more blades.
C. a blade that is divided into many leaflets.
D. many blades, each with its own petiole.
23–4
The structure of a leaf allows it to
A. maximize sun exposure and maximize water loss.
B. maximize sun exposure and minimize water loss.
C. minimize sun exposure and maximize water loss.
D. minimize sun exposure and minimize water loss.
23–4
A process in which water is lost through the leaves of a plant is called
A. transpiration.
B. photosynthesis.
C. glycolysis.
D. cellular respiration.
23–4
Gas exchange in a leaf occurs through
the
A. cuticle.
B. epidermis.
C. mesophyll.
D. stomata.
23–5
In a plant stem, water moves from
A. leaves to roots through xylem.
B. roots to leaves through xylem.
C. leaves to roots through phloem.
D. roots to leaves through phloem.
23–5
Which of the following is NOT involved in the movement of water in xylem tissue?
A. cohesion
B. osmosis
C. capillary action
D. adhesion
23–5
In a plant, sugar is moved from source
cells to sink cells by a process of
A. phloem transport.
B. xylem transport.
C. osmosis.
D. diffusion.
24–1
In a gymnosperm, fertilization occurs
inside the
A. ovule.
B. pollen tube.
C. seed cone.
D. pollen cone.
24–1
The pollen-producing structure of
angiosperms is the
A. stigma.
B. carpel.
C. anther.
D. sepal.
24–1
In an angiosperm, a structure that
results from fertilization is the
A. female gametophyte.
B. pollen grain.
C. zygote.
D. ovary.
24–1
Which term applies to the chromosome number of a seed plant embryo?
A. haploid
B. diploid
C. triploid
D. polyploid
24–1
Pollination in most gymnosperms and
some angiosperms is carried out by
A. water transport.
B. insects.
C. wind.
D. birds and bats.
24-2
A germinating corn seedling has
A. a single cotyledon, which remains below ground.
B. two cotyledons, which push above ground.
C. a single cotyledon, which pushes above ground.
D. two cotyledons, which remain below ground.
24-2
Angiosperm fruits develop from
A. the ovary wall of the flower.
B. seed endosperm.
C. swollen sepals of the flower.
D. flower stamens.
24-2
The seeds of many plants that form
fruits are dispersed mainly by
A. animals.
B. water.
C. wind.
D. the plant itself.
24-2
An environmental condition that can cause the activation of a dormant seed is
A. a sharp drop in temperature.
B. the heat from a forest fire.
C. an extended drought.
D. falling from a great height.
24-3
Which of the following is a method of
vegetative reproduction?
A. pollination
B. seed dispersal
C. plantlet production
D. fertilization
24-3
Long, trailing stems that can produce
roots are called
A. scions.
B. stolons.
C. cuttings.
D. buds.
24-3
In order to propagate a plant by
cuttings, the cuttings must include
A. roots, stems, and leaves.
B. xylem and phloem.
C. meristematic tissue.
D. ground tissue.
24-3
The process in which a stem is used as
a scion is called
A. grafting.
B. budding.
C. stock.
D. stolon.
25–1
The tendency of a plant to grow
toward a source of light is
A. gravitropism.
B. phototropism.
C. meristematic growth.
D. apical dominance.
25–1
A plant part in which hormones are
produced is
A. the apical meristem.
B. a target cell.
C. a hormone receptor.
D. xylem.
25–1
If you snip off the tip of a stem, the
A. plant grows tall and narrow.
B. plant dies.
C. side branches begin to grow
more quickly.
D. stem stops growing.
25–2
The rapid (nastic) responses of plants such as the Venus flytrap are caused by changes in
A. light levels.
B. osmotic pressure.
C. temperature.
D. moisture.
25–2
The timing of seasonal activities in plants, such as flowering and growth, depends on
A. gravitropism.
B. thigmotropism.
C. photoperiodism.
D. phototropism.
25–2
The hormone primarily responsible for causing plants to flower depending on the length of the day is
A. auxin.
B. phytochrome.
C. cytokinin.
D. ethylene.
25–2
In most flowering plants, the coming of autumn is marked by
A. a decrease in ethylene production.
B. an increase in auxin production.
C. the production of new plant pigments.
D. a rapid growth spurt.
25–2
In deciduous plants, the process of dormancy involves
A. maintaining photosynthesis and storing material in the roots.
B. turning photosynthesis off and storing material in the roots.
C. maintaining photosynthesis and bringing material up from the roots.
D. turning photosynthesis off and bringing material up from the roots.
25-3
Carnivorous plants trap animals and
digest them, releasing needed
A. water.
B. sugars.
C. nitrogen.
D. oxygen.
25-3
An example of a plant that is a
xerophyte is a
A. cactus.
B. water lily.
C. pitcher plant.
D. mistletoe.
25-3
Salt-tolerant plants remove excess salt absorbed through their roots by the process of
A. diffusion.
B. osmosis.
C. active transport.
D. dilution.
25-3
An example of a carnivorous plant is a
A. mistletoe.
B. Venus' flytrap.
C. Spanish moss.
D. foxglove.
25-3
An example of a plant’s chemical defense is a substance that
A. disrupts insect reproduction.
B. removes excess salt.
C. enables plants to digest insects.
D. absorbs water without using root hairs.