Which of the following groups of animals does NOT exhibit a "double circulation" and four-chambered hearts?

A. mammals
B. birds
C. crocodilians
D. snakes
E. All of the groups listed exhibit a complete double circulation.


D. snakes

Biology & Microbiology

You might also like to view...

Which of the following plant hormones stimulates development of an abscission zone in the leaf petiole?

A. ethanol B. gibberellins C. abscisic acid D. auxin E. ethylene

Biology & Microbiology

Alzheimer disease has two forms: the early onset _____________________ form with a strong pattern of familial inheritance, and the late onset _____________________ form

Fill in the blank(s) with correct word

Biology & Microbiology

An adenovirus

a. is a naked virus. b. does not have a lipid envelope. c. has a spiked protein coat. d. infects animals. e. all of these.

Biology & Microbiology

How do planarians survive without a circulatory system? What will be an ideal response?

Biology & Microbiology