22.1 Plant Life Cycles TEKS 10B
Bell Ringer
22.1 Plant Life Cycles TEKS 10B
KEY CONCEPT
1. All plants alternate between two phases in their life
cycles.
2. Reproduction of flowering plants takes place within
flowers.
3. Seeds disperse and begin to grow when conditions
are favorable.
4. Plant hormones guide plant growth and development.
22.1 Plant Life Cycles TEKS 10B
Words to Learn;
1. Alternation of
Generation
2. Sporophyte
3. Gametophyte
4. Gymnosperm
5. Angiosperm
6. Sepal
7. Petal
8. Carpel/Pistil
9. Ovary
10. Stamen
11. Germination
12. Tropism
13. Phototropism
14. Thigmotropism
15. Gravitropism
16. Hydrotropism
17. Hormone
22.1 Plant Life Cycles TEKS 10B
Alternation of Generations
• life cycle, which
alternates between
diploid and haploid
phases,
22.1 Plant Life Cycles TEKS 10B
Sporophyte
• And algae that have
alternation of
generation, the
diploid individual or
generation that
produces haploid
spores
22.1 Plant Life Cycles TEKS 10B
Gametophyte
• In alternation of
generations, the
phase which
gametes are formed;
a haploid individual
that produces
gametes.
22.1 Plant Life Cycles TEKS 10B
angiosperm
•is a seed plant
that has seeds
enclosed in some
type of fruit.
22.1 Plant Life Cycles TEKS 10B
Seeds allow plants to disperse to new places.
conegymnosperm
• is a seed plant whose
seeds are not enclosed
in fruit
• is the reproductive structure of most
gymnosperms.
• It contains hard protective scales.
22.1 Plant Life Cycles TEKS 10B
• Sepal; are
modified leaves
that protect the
developing
flower.
• Petal; The layer
just inside the
sepals
• Stamen; is the
male structure of
a flower
Flowers contain reproductive organs protected by
specialized leaves.
22.1 Plant Life Cycles TEKS 10B
• Carpel/Pistil; The
innermost layer of
a flower is made
up of the female
structure
• Ovary; Where the
female
gametophytes are
produced, found at
the base of a
flower.
Flowers contain reproductive organs protected by
specialized leaves.
22.1 Plant Life Cycles TEKS 10B
Germinationthe embryo breaks out of the seed coat and begins to grow
into a seedling,
22.1 Plant Life Cycles TEKS 10B
Hormones
is a chemical messenger produced in one part of an organism
that stimulates or suppresses the activity of cells in another
part.•Examples of plant hormones
include;
• Ethylene; causes ripening of is
naturally produced by fruits.
• Gibberellin; produces a dramatic
increase in size.
• Auxin; are plant hormones
involved in the lengthening of
plant cells produced in the
apical meristem, or growing tip.
22.1 Plant Life Cycles TEKS 10B
Plants can respond to
light, touch, gravity, and
seasonal changes.
22.1 Plant Life Cycles TEKS 10B
Tropism
the movement of a plant in
response to an environmental
stimulus.
22.1 Plant Life Cycles TEKS 10B
Hydrotropism
the growth or turning of
plant roots toward or
away from moisture.
22.1 Plant Life Cycles TEKS 10B
Phototropism
tendency of a plant to grow toward light
22.1 Plant Life Cycles TEKS 10B
Thigmotropism
• plants also have
a response to
touch
22.1 Plant Life Cycles TEKS 10B
Gravitropism
• plants also have
a response to
Earth's
gravitational pull.
22.1 Plant Life Cycles TEKS 10B
22.1 Plant Life Cycles TEKS 10B
Asynchronous Assignment
• Face to Face Instruction Survey
• Assignment on Virtual Class Notebook,
– Homework tab.
– Page title “Parts of the Flower”
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