One advantage of the three-chambered heart over the two-chambered heart is that ____
a. oxygen-rich and oxygen-poor blood do not mix
b. blood pressure is independently controlled in each vascular circuit
c. blood flow is faster when there are two circuits instead of one
d. capillary beds are possible with a three-chambered heart but not a two-chambered heart
e. oxygen-rich and oxygen-poor blood mix
ANSWER: c
You might also like to view...
Which of the following is a component of a vertebrate kidney (select all correct choices)?
A. glomerulus B. Bowman's capsule C. renal tubules D. collecting ducts E. Malphigian tubules
Reinforcement is most likely to drive the evolution of
A. prezygotic isolating mechanisms, because selection favors alleles that prevent hybridization. B. postzygotic isolating mechanisms, because selection acts after the formation of hybrids. C. prezygotic isolating mechanisms, because selection favors alleles that promote hybridization. D. postzygotic isolating mechanisms, because hybrids have low fitness relative to the parents.
Mitosis and meiosis differ in that
A) homologues are separated in prophase I of meiosis. B) homologues are separated in prophase II of meiosis. C) homologues are separated in prophase of mitosis. D) sister chromatids are separated in prophase I of meiosis. E) sister chromatids are separated in anaphase of mitosis.
A tautomer is
A) a mutagen. B) an RNA base. C) an alternate structure of a molecule. D) the type of bond that holds DNA bases together.