Chapter 17

Question 1

True/False

The frogs and toads are the most familiar but least numerous amphibians

Answer 1

False

Question 2

True/False

The double circulation of tetrapods consists of a circulation serving the body and a circulation serving the lungs

Answer 2

True

Question 3

True/False

Most amphibians remain dependent on their aquatic environment because of their method of reproduction

Answer 3

True

Question 4

Most familiar North American salamanders (family Plethodontidae) lack both gills and ______.

Answer 4

Lungs

Question 5

True/ False

Some frogs tolerate ill effects of freezing by accumulation of glucose and glycerol in the body fluids

Answer 5

True

Question 6

Most salamanders are fertilized internally, usually after the female picks up a packet of sperm called the _______.

Answer 6

Spermatophore

Question 7

True/False

Evidence points to the ray-finned fishes (Actinopterygii) as the closest relatives to the terrestrial vertebrates

Answer 7

False

Question 8

Some salamanders (such as mud puppy Necturus), that retain features as adults that were found only in the larval stages of their ancestors, are said to be _______.

Answer 8

Paedomorphosis

Question 9

_______ are carnivorous in both the adult and larval stages.

Answer 9

Salamanders

Question 10

Frogs and toads belong to the order _____, a name that means “without a tail.”

Answer 10

Anura