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Chapter 29: Q. 27 (page 827)
Explain why frogs are restricted to a moist environment.
A moist environment is required, as frog eggs lack a shell and dehydrate quickly in dry environments.
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Which of the following is part of a clade believed to have died out, leaving no descendants?
a. Paranthropus robustus
b. Australopithecus africanus
c. Homo erectus
d. Homo sapiens sapiens
How would the chest structure differ between ostriches, penguins, and terns?
Members of the order Testudines have an anapsid-like skull without obvious temporal fenestrae. However, molecular studies indicate that turtles descended from a diapsid ancestor. Why might this be the case?
A marine biologist catches a species of fish she has never seen before. Upon examination, she determines that the species has a predominantly cartilaginous skeleton and a swim bladder. If its pectoral fins are not fused with its head, to which category of fish does the specimen belong?
a. Rays
b. Osteichthyes
c. Sharks
d. Hagfish
Based on how reptiles thermoregulate, which climates would you predict to have the highest reptile population density, and why?
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