Kingdoms Dr. Childs Science Computer Lab Winter, 2004.
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Transcript of Kingdoms Dr. Childs Science Computer Lab Winter, 2004.
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Kingdoms
Dr. Childs
Science Computer Lab
Winter, 2004
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Concepts
• Types of cells prokaryotes & eukaryotes• Nutrition autotrophs & heterotrophs• Number of cells unicellular, colonial, &
multicellular• Reproduction sexual & asexual• Motility non-motile & motile
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Types of Cells
• Prokaryotes– Cells lack nuclear membranes – No membrane bound organelles as mitochondria or
chloroplasts– Reproduce by binary fission– Includes:
• bacteria• cyanobacteria (= blue-green algae)
bacteria
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Types of Cells
• Eukaryotes– Cells have nuclear membranes – Membrane bound organelles such as mitochondria
or chloroplasts– Reproduce by mitosis– Includes:
• Protista• Fungi, plants, and animals
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Types of Nutrition• Autotrophs
– Organisms produce their own carbon compounds (sugars)– Energy from sunlight – photoautotrophs (includes plants and some
bacteria) – Energy from chemicals – chemoautotrophs (bacteria from deep sea
vents)
• Heterotrophs– Carbon compounds from other organisms– Fungi (include decomposers)– Protists and animals
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Numbers of Cells
• Single celled organisms– Includes bacteria and some protists
• Colonial organisms– Some bacteria and algae – Single cells attached together– Earliest “tissues”
• Multicellular organisms– Specialized cells with different functions– Tissues and organs– Fungi, plants, animals
Colonial organism
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Reproduction• Sexual reproduction
– Exchange of genetic material (DNA)– Male (motile sperm) and female (stationery egg)– Pollen and seeds in plants
• Asexual reproduction– No exchange of DNA– Common in plants– Includes:
• grafting or • rooting a branch in water• cloning in animals
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Motility
• Motile- Able to move- Includes animals hunting – move actively
• Non-motile– Not able to actively move– Most plants are rooted– Consider that plant may have seeds that move
passively with animals (insects or birds) or with the wind
– Some animals as sponges motile stages as larvae but are non-motile as adults
Maple seed
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Kingdoms
Kingdoms are major groups of organisms with distinct characteristics and are the most inclusive of the taxonomic classifications.
There are six generally accepted kingdoms: • Archaebacteria • Eubacteria• Protista• Fungi • Plantae• Animalia
Note: In many texts Archaebacteria and Eubacteria have been grouped as Monera.
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Relationships Among Kingdoms
Eubacteria Archaebacteria
Protista
Fungi
Plantae
Animalia
Earliest Life
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Archaebacteria
• “Archae-” derived from “ancient” (as “archeology”)
• prokaryote, single cell• photo- and chemosynthetic• Reproduction by binary fission
• Exist in extreme environments:– Hot springs Yellowstone
deep sea vents (chemosynthesis)
– High salt Great Salt LakeDead Sea
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ArchaebacteriaArchaebacteria
Hot springs
Deep sea thermal vents
Archaebacteria
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Eubacteria• “Eu-” derived from “true”• Prokaryote, single cell; some colonial• Heterotrophic, some photosynthetic• Reproduction by binary fission
• Common in almost all environments– Soils & water – Foods– Intestine & skin
• Extremely diverse– Many beneficial (produce cheese)– Few cause disease (= “pathogens” )
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EubacteriaEubacteria
Penicillin
Bacteria
Isolation & diagnosis
Motile bacteria
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Protista
• Eukaryotes• Many unicellular; some colonial; few multicellular• Asexual and sexual reproduction • Cellular Reproduction by mitosis• Some autotrophic, some heterotrophic, and
some both• Includes two major groups - protozoa and algae
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Protista - Protozoa• Mostly single cell• Mostly heterotrophic, some autotrophic• Many motile (cilia & flagella)• Many free-living
– Amoeba– Paramecium
• Includes medically important parasites– Malaria– African sleeping sickness
• Some symbiotic in termites
Paramecium
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Protista - Protozoa
ParameciumAmoeba
African SleepingSickness Malaria
Termite symbiont
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Protista - Algae
• Some unicellular, some colonial, some multicellular• Mostly autotrophic (photosynthetic) - Important source
of atmospheric oxygen • Many attached to substrate; some motile• Marine (salt water) and aquatic (fresh water)• May be ancestors of plants
Green algae
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Protista - Algae
Green algae“pond scum”
Volox Colonial green algae
Kelp
Brown seaweed
Green seaweed
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Fungi
• Eukaryotes• All heterotrophic • Important decomposers• Mostly multicellular with filamentous bodies• Some unicellular ( yeasts)• Asexual and sexual reproduction
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Fungi
Mushrooms
Molds
Yeast – Breads
Ringworm – parasitic fungiPenicillum antibiotic
Toxic interior mold
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Plantae
• Eukaryotes• Almost all autotrophic (photosynthetic)• Multicellular; tissues (roots, stems, leaves)• Asexual reproduction• Sexual reproduction (seeds & fruits)• Mostly terrestrial; aquatic secondarily
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Plantae
Maple
Pine
Cactus
Moss
Radish
Cypress tree
Fern
Bluebell
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And, finally …
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Animalia
• Eukaryotes• Principally sexual reproduction• Heterotrophic – mainly food hunters• Multicellular - tissues and organs
– Development of a head and nervous system
• Usually an digestive tract
Planaria
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AnimaliaJellyfish
Starfish
Mammal
FishInsect
Earthworm
Hermit crab
Sponge
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