The immotile sperm develop motility in about 18 hours after arriving at the long, coiled tube called what?
A. Testis
B. Vas deferens
C. Semiferous tubules
D. Epididymis
Answer: D
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Which of the following statements about catabolic reactions is FALSE?
A. They recycle organic building blocks. B. They produce energy like ATP. C. They produce energy in the form of energy intermediates like NADH. D. They occur through the oxidation of substrates. E. They usually require an input of energy.
If the water pressure surrounding soil is higher than that in living root epidermal cells, then water should __________.
A. Leave the roots cells, making them flaccid B. Enter the root cells, making them turgid C. Leave the root cells, making them turgid D. Enter the root cells, making them flaccid E. None of these accurately describe water movement
Generally speaking, when the female gamete (ovum) is fertilized by the male gamete (sperm), a fusion of their nuclei restores the number of chromosomes to:
a) Hardy-Weinberg equilibrium. b) the pre-existing gene frequency in the population. c) the double helix. d) the haploid condition. e) the diploid condition.
_______ biogeography studies the current factors affecting the distribution of plants and animals.
a) Ecological b) Historical c) Zoological d) Conservation