What is the most frequent cause of infertility in males?
A. body weight
B. pelvic inflammatory disease
C. low sperm count
D. tubal ligation
E. endometriosis
Answer: C
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You purchase two identical houseplants and place them side by side on your windowsill. You keep the soil moist in one of the plants (plant a), and you water the other plant (plant b) only once every two weeks
Do you expect the plants to be the same height after six months of this watering regime? A. Yes, because both plants are still getting water. B. Yes, because both plants are still getting water and sunlight. C. No, because the cells of the apical meristem are unable to express meristem identity genes without sufficient water in plant b. D. No, because the cells of the apical meristem are unable to elongate without sufficient water in plant b.
Most of the water vapor in the earth's
atmosphere comes from evaporation from a. lakes. b. rivers. c. land. d. oceans. e. plants.
Most of the filtrate is reabsorbed through the walls of the:a
distal convoluted tubule. b. loop of Henle. c. proximal convoluted tubule. d. collecting duct. e. glomerulus.
A species has n=4 chromosomes. Genes on the same chromosome have a maximum recombination recombination rate of:
a. 100% b. 75% c. 50% d. 25% e. 0%