diversity of organisms and...
TRANSCRIPT
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Diversity
of
Organisms
and
Classification
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Essential Vocabulary
DNA Prokaryotic: a cell that lacks a nucleus
Eukaryotic: a cell that has a nucleus and other complex structures
Feeding Autotrophic: an organism that makes it’s own
food from solar energy or chemicals
Heterotrophic: an organism that must eat other organisms to obtain it’s energy
.
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Classification of Organisms
Kingdom
Phylum / Division
Class
Order
Family
Genus
Species
King
Phillip
Came
Over
For
Green
Soup
All organisms can be
classified and named
according to this system;
based on shared traits
and a common origin
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Classification of Bears
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Five Kingdom System
Bacteria
Protists
Fungi
Plants
Animals
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1. Why Classify?
To study the diversity of life
To organize and name organisms
2. Why give scientific names?
Common names are misleading
Finding Order in Diversity
Go to
Section:
jellyfish silverfish star fish
None of these animals are fish!
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Bacteria Kingdom
Unicellular, microscopic
Motile (Moves)
No nucleus Prokaryotic
No chlorophyll Decomposers (Saprophytic)
Sapro “rotten”
Phytic “plants”
Parasitic E. Coli: food poisoning (deadly)
Normally found in intestines
Beneficial Lactobacillus: yogurt and cheese
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Protist kingdom
Unicellular; microscopic
Nucleus present
Eukaryotic
Autotrophic or heterotrophic
Classified by how they move
Plant like: Phytoplankton
Provide most of worlds oxygen
Animal like: Zooplankton
Their remains are used in cleansers such
as toothpaste and comet
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Fungus kingdom
Eukaryotic
Non-motile (don’t move)
No root, stem and leaf
No chlorophyll Decomposers
Saprophytic or parasitic
Reproduce by forming spores
Most are multicellular: mushrooms, bread mold etc..
Unicellular: yeasts
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Plant Kingdom
Eukaryotic
Non-motile (don’t move)
Most plants contains pigments (chlorophyll) for photosynthesis
Autotrophic
Can be divided into two groups:
Non-flowering plants
Flowering plants
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Animal Kingdom
Eukaryotic
Divided into two groups
according to the presence or
absence of backbone:
Invertebrates : without backbone
Sponges, Cnidarians, Flatworms,
Round worms, Mollusks, Segmented
Worms, Arthropods, Echinoderms,
Vertebrates : with backbone
Fish, Amphibians, Reptiles, Birds,
Mammals
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Animals are separated into groups or
categories so that they are more easily
studied and discussed by scientists and
others.
Use the following slides to fill in the
“Classification Quest” Worksheet
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Important Invertebrates:
Arthropods
• Most diverse group of invertebrates
• Segmented body
• Hard exoskeleton
• Several pairs of jointed legs
• Divided into 3 groups:
1. Crustaceans
2. Arachnids
3. Insects
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Diversity
Insects
Body with 3 segments
6 legs
Moths, Butterflies, Bees,
Praying Mantis
Arachnids
Body with 2 segments
8 legs
Spiders, Scorpions, Ticks
Crustaceans
2 antennae
Body with 3 segments
7 or more pairs of legs
Gills
Aquatic and Land Forms
Lobsters, Rollie Pollies,
Shrimp
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Vertebrate Groups:
Fish
Amphibians
Reptiles
Birds
Mammals
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Fish
Live in water (Aquatic)
Cold-blooded
Body covered with wet and slimy
scales
Streamline body for easy movement
through water
Fins for balance and to control
movement
Gills for breathing, must keep moving
to breathe
External fertilization
Most fish lay large numbers of eggs,
but some have live birth
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Amphibians
Cold-blooded
Moist, scaleless skin
Must stay close to water
Amphibian means "two lives,
(metamorphosis)
Limbs present
Tetrapods (walk on four legs)
Larvae (tadpoles) use gills for
breathing; adults use lungs
External fertilization
Lay eggs in water
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Reptiles
Cold-blooded
Body covered with dry, hard
scales
Lives on land
Breathe with lungs, and
sometimes absorb oxygen though
their mouth
Internal fertilization (mating)
Lay shelled eggs ( hard or leathery)
Closely related to birds
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Birds
Warm-blooded
With feathers and wings
Have bodies and hollow bones that
are adapted for flight
Beak for feeding
Lungs for breathing
Internal fertilization ; lay hard shelled
eggs
Live in almost every habitat on earth
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Mammals
Warm-blooded
Specialized Teeth based on food preferences
Single Jaw bone
Hair on skin
Females have mammary glands for producing milk
Lungs for breathing with a diaphragm
Internal fertilization
Embryos develop inside mothers body
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Mammal Subgroups
1. Monotremes
egg-laying mammals
duckbilled platypus, echidna
2. Marsupials
pouched mammals
short-lived placenta
koala, kangaroo, opossum
3. Placental
true placenta
shrews, bats, whales, humans