Chapter 10: Animal Classification

Describe at least 3 characteristics used to classify animals into various phyla.

(any three) Animals can be classified according to... 1. ...their symmetry: bilateral, radial, or asymmetry 2. ...cephalization: the clustering of sensory organs at one end of the body. 3. ...whether they have a body cavity and complete or incomplete guts. 4. ...presence of a notochord or back bone. 5 ....how they regulate body temperature: endotherms regulate their body temperatures using internal processes, while ectotherms regulate their body temperatures by their behavior.

Characteristics used to classify animals (pp. 194- 197) **HINT: there are 6 of them**

1) Symmetry 2) Heads 3) Guts 4) Body Cavities 5) Backbone 6) Temperature control Here's a mnemonic to help remember: She Has Guts But Behaves Terribly 😛

Describe at least two differences between snakes and lizards.

1. Snakes have no legs, lizards have 4. 2. Snakes do not have ear openings, lizards do. 3.Snakes have immovable eyelids, lizards' are moveable.

T/F Invertebrates do not have skeletons

False Invertebrates do not have backbones.

T/F Most animals have vertebrae.

False Less than 10% of animals have vertebrae.

T/F Monotremes raise their young in a pouch.

False Marsupials raise their young in a pouch.

T/F All animals reproduce asexually, but some can produce sexually.

False Most animals reproduce sexually, but some can reproduce asexually.

A chelicera is a type of ___________

Mouthpart

Explain according to biblical teaching why managing over two hundred separate salmon stocks is not a waste of time.

The Creation Mandate commands people to rule and care for the earth's creatures, including salmon

radial symmetry (p. 194)

The quality of having many lines of symmetry that all pass through a central point. (example: jellyfish)

Squids have a hard internal structure supporting their body that is often considered an endoskeleton. Why then are squids not classified with the vertebrates?

The squid's endoskeleton does not include vertebrae. Additionally, its endoskeleton is a nonliving secretion, not made of living cells.

Which of the following is not a characteristic of ALL mammals?

They have a placenta

T/F An animal with a complete gut has a digestive system with two openings.

True

chordate (p. 196)

animal that at some point during their lives have a notochord.

endotherm (p. 197)

animals that can regulate their inner temperatures (example: a bird)

Invertebrates with jointed appendages are called ___.

arthropods

Crustaceans

arthropods with either 8 or 10 legs

All vertebrates have

backbones, endoskeletons, skulls

Sharks and rays are examples of __________ fish.

cartilaginous

All animals are _______________

consumers

Snakes often need sunlight to help warm their sluggish bodies after a cold night because they are

ectotherms

Lampreys and hagfish differ from other fish because they

have no jaws

Which of the following characteristics do crocodiles not share with other reptiles?

having a three-chambered heart

Mollusks

invertebrates (except for cephalopods) that rely on hard shells for protection

Sponges

invertebrates without symmetry, cephalization, or guts

Cnidarians

jellyfish and coral

Worms

long, soft-bodied animals with bilateral symmetry

Identify each of the following mammals as a marsupial, a monotreme, or a placental mammal: dog, echidna, kangaroo, opossum, platypus, and whale

marsupials: kangaroo, opossum monotremes: echidna, platypus placental mammals: dog, whale

Periodic shedding of skin by squamates is called

molting

A lobster is considered an invertebrate because it has

no backbone

insects

only invertebrates that can fly

Which of the following is not an arthropod?

oyster

Leeches, a type of segmented worm, have which of the following?

repeating body divisions that contain the same set of organs

Echinoderms

sea urchins and other marine animals with radial symmetry and spiny skin

Cephalization (p. 195)

sensory organs and a brain concentrated at one end

Chelicerates

spiders, scorpions, and other arthropods with 2 body segments and 8 legs

Which animal is a "pore bearer"?

sponge

What are cnidocytes?

stinging cells that cnidarians use to capture food

Amphibian skin is characterized by

the ability to exchange oxygen and carbon dioxide

Baraminology (p. 199)

the study of classification based on the idea of created kind (Baraminology comes from the Hebrew words meaning "created kind")

Evolutionary taxonomists classify or reclassify animals on what basis?

their supposed evolutionary relationships or common ancestors

Which of the following structures attaches an embryo to a placenta?

umbilical cord

mammals (p. 210)

vertebrates that have hair and produce milk for their young through the mammary glands of the mother mammal.