What kind of circulatory system do fishes have?
A) closed circulatory system
B) open circulatory system
C) quadruple loop
D) double loop
Ans: A) closed circulatory system
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Many tadpoles excrete ____, whereas adult frogs excrete ____
A. ammonia; urea B. urea; ammonia C. uric acid; ammonia D. uric acid; urea E. urea; uric acid
What is a disadvantage of sexual reproduction?
a. Sexual reproduction generates less genetic diversity than asexual reproduction. b. Sexual reproduction decreases the chance that offspring may be able to live and reproduce in diverse environments. c. Sexual reproduction decreases the chance that, in a changing environment, at least some offspring will grow and reproduce successfully. d. Sexual reproduction produces fewer offspring per parent than asexual reproduction. e. On average, sexual reproduction generates unequal numbers of males and females.
Proton pumps within the electron transport chain transport H+ ions __________.
a. from intermembrane space to cytoplasm
b. from cytoplasm to matrix
c. from matrix to intermembrane space
d. from matrix to cytoplasm
Which of the following drugs are likely to reduce blood pressure: (Select all that apply.)
a. An agonist of alpha and beta adrenergic receptors b. An antagonist of muscarinic receptors c. A drug that increases sodium excretion d. A drug that blocks calcium channels on myocardial cells