Science Unit 2 Lesson 4 Classifying Animals Key Words Question Preview (ID: 38744)


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This group includes spiders, crabs, and insects. They have a very efficient body plan with being small/light and a hard skeleton on the outside of the body called exoskeleton. They are bilateral symmetry and complex invertebrates.
a) echinoderms
b) arthropods
c) mollusks
d)

Invertebrates do not have a backbone. Porifera, cnidaria, and worms are simple invertebrates.
a) true
b) false
c)
d)

______ include sea stars, sea urchins, and sea cucumbers. They have a hardened skeleton located inside the body called endoskeleton and they are complex invertebrates.
a) echinoderms
b) arthropods
c) mollusks
d)

All _____ share the same body plan. They have muscular foot or tentacles. They all have bilateral symmetry. Ex. snails, clams, and squids, almost all these have a shell and all are complex invertebrates.
a) echinoderms
b) arthropods
c) mollusks
d)

All vertebrates are animals that have a backbone. They also have bilateral symmetry and endoskeletons.
a) true
b) false
c)
d)

Which animal group has the least organized body plan?
a) flatworms
b) mollusks
c) porifera
d) reptiles

Which of the following does not have bilateral symmetry?
a) worms
b) fish
c) mammals
d) sponges

Which of the following body features do bony fish have that sharks do NOT have?
a) gills
b) cartilage
c) swim bladders
d) jaws

Sea stars and sea cucumbers are _____.
a) mollusks
b) echinoderms
c) arthropods
d) cnidarians

Which animal is radially symmetrical?
a) sea sponge
b) jellyfish
c) worm
d) mollusks

How are annelid worms, such as earthworms, different from other worms?
a) Their bodies are divided into segments.
b) They have a digestive system.
c) They live inside the bodies of other animals.
d) Their bodies have bilateral symmetry.

Which organism is a complex invertebrate?
a) sponge
b) flatworm
c) coral
d) crab

Which is NOT a simple invertebrate?
a) snails
b) sponges
c) jellyfish
d) roundworm

An organism with this symmetry has more than one line that divides this organism, arranged around a central point. For Ex: Jellyfish, sea anemones, corals, hydras, are all cnidarians of this group and simple invertebrates.
a) asymmetrical
b) radial symmetry
c) bilateral symmetry
d)

A mammal in which the female has a pouch where offspring develop after birth. For Example: Kangaroos and koala bears
a) marsupial
b) monotreme
c) placental mammal
d)

A mammal that lays eggs after the young hatch they are fed milk from their mothers. For Example: Duck billed platypus and the spiny anteater are members of this group. Do not mistake this for birds!
a)
b) marsupial
c) placental mammal
d) monotreme

A mammal whose young develops within the mother. For example: dogs, tigers, whales, and elephants.
a) placental mammal
b) monotreme
c) marsupial
d)

A body plan in which an organism can be divided along only one plane of its body to produce two mirror images that are alike. For Example: Worms and all vertebrates simple and complex.
a) asymmetrical
b) bilateral symmetry
c) radial symmetry
d)

Cannot be divided into mirror images. Example: Sponges have no true organization and are the only animals without real tissues or organs. They are simple invertebrates.
a) radial symmetry
b) bilateral symmetry
c) asymmetrical
d)

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