scienceChapter 11

Animal characteristics

I. MulticellularII. EukaryoticIII. Specialized for different functionsIV. Have a protein called collagenV. Get energy by eating other organisms-

consumersVI. Digest own foodVII. Reproduce sexuallyVIII. Capable of movement

Animal characteristics

3 Characteristics for animal classification

Vertebrates- animals with a backbone Invertebrate- animals without a backbone

backbones

Radial symmetry- Body parts are arranged in a circle around the center of the body.

Bilateral symmetry- Body parts are arranged the same way on both sides of the body.

Asymmetry- Body parts are not arranged in any particular way.

Symmetry

When scientists classify an animal`s DNA it is called molecular classification.

Molecular classification

Characteristics of all vertebrates

nerve chordTailPharyngeal pouch

chordate

FlexibleRodExtend to the length of a body

notochord

Connects all nerves

Spinal chord

Well developed organisms.

vertebrae

5 major groups of vertebrate

Have gills and fins Jawless fish, cartilaginous fish, and bony

fish.

fish

Lack jaws

Jawless fish

I. Frogs, toads, and salamandersII. Skeletons and legsIII. Smooth, and moist skinIV. Develop lungsV. Live on land

amphibians

SkeletonsCartilage

Cartilaginous fish

No cartilageGrouped together

Bony fish

I. Lizards, snakes, turtles, crocodiles, and alligators

II. Water proof skin with scalesIII. 3-chambered heartsIV. LungsV. Lay eggs on land

reptiles

I. 2 legsII. 2 wingsIII. Ducks, flamingoes, penguins, etc.IV. Make nests to hold eggsV. 4-chambered heartsVI. BeaksVII. Digestive system

birds

I. Whales, dolphins, humans, etc.II. FurIII. Chew with teethIV. Nervous systemV. Produce milk

mammals

The end