Question

2) Evolutionarily, the jaws of vertebrates developed from:

A) the circular mouth of lampreys

B) the last pharyngeal arch of jawless fishes

C) the third and fourth gill arch of jawless fishes

D) the operculum

E) The claspers

3) Animals which produce enough internal body heat by their metabolism that are able to maintain a relatively constant body temperature are:

A) homeothermic

B) thermogenic

C) poikilothermic

D) endothermic

E) ectothermic

4) Which fish is/are most closely related to (and are 'sister taxa' to) tetrapods?

A) ray-finned fish

B) conodonts

C) lungfish

D) caecilians

E) coelacanth

F) Lamprey

5) Which of these are characteristics found in amphibia?

A) 2-chambered heart

B) cutaneous respiration

C) scales with slime

D) poison glands in skin

E) shelled egg

F) metamorphosis

G) aquatic larval stage

Answer 1

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