The letter “D” in the above figure represents
a. a kidney.
b. a urethra.
c. a urinary bladder.
d. a ureter.
e. water.
Answer: b
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Which of the following processes will occur in the presence or absence of oxygen?
A. electron transport chain B. oxidative phosphorylation C. citric acid cycle D. glycolysis E. cellular respiration
Anury is the absence or abbreviation of the tail in sheep (and also other animals). It is inherited in an autosomal dominant fashion. A ram with anury is mated to a ewe with a normal tail. The ram’s father had anury, his mother did not. What is the probability that the ram and ewe will produce a lamb with anury? (ram = male; ewe = female)
A. 25% B. 50% C. 75% D. 100% E. No chance
In bryophytes, the rhizoids
a. serve as attachment structures. b. obtain nutrients. c. obtain water. d. lure possible prey. e. are involved in reproduction.
Humans have twenty-three pairs of chromosomes and chimps have twenty-four pairs of chromosomes. What is the most likely explanation for these differences in human and chimp genomes?
A) The common ancestor of humans and chimps had twenty-four pairs of chromosomes. After the two groups evolved, two human chromosomes fused end to end B) In the evolution of chimps, new adaptations resulted from additional chromosomal material. C) At some point in evolution, human and chimp ancestors reproduced with each other. D) Errors in mitosis resulted in an additional pair of chromosomes in chimps.