What would be most likely to occur if one of a man's testicles failed to descend (drop into the scrotum)?
A. He would have exaggerated secondary sex characteristics.
B. The pH of his semen would be higher than normal.
C. Gonadotropins within the undescended testicle would be inactivated.
D. He would have a lower than normal sperm count.
E. He would be unable to undergo spermatogenesis.
Answer: D
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The main class of neurotransmitters involved in regulating mood in vertebrate animals is/are
A. the biogenic amines. B. acetylcholine. C. amino acids. D. gases such as nitric oxide and carbon monoxide. E. acetylcholine and amino acids.
The human protein TPA has domains that are genetically similar to domains from other proteins,
including epidermal growth factor and fibronectin. This is best explained by ____.
a. alternative splicing b. degeneracy c. exon shuffling d. the wobble hypothesis e. aminoacylation
An -OH group is a(n) ____ group
a. carboxyl b. hydroxyl c. amino d. methyl e. carbonyl
"MyPlate" provides a personalized approach to assist an individual in developing a successful nutrition and exercise plan
Indicate whether the statement is true or false