The group of Fungi in which sexual reproduction has not been observed is
A. Ascomycetes.
B. Deuteromycetes.
C. Zygomycetes.
D. Basidiomycetes.
B
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The plant hormone abscisic acid (ABA) is involved in the regulation of photorespiration. Based on this information, ABA likely plays a role in
A. the photoelectric effect. B. cyclic photophosphorylation. C. the opening and closing of stomata. D. noncyclic photophosphorylation.
The activation of the parasympathetic branch of the autonomic nervous system is associated with _____
A) resting and digesting B) release of epinephrine into the blood C) increased metabolic rate D) intensive aerobic exercise
Cardiac muscle cells are ____ because a person cannot deliberately make them contract.
A. involuntary B. voluntary C. reflexive D. slow contracting E. smooth
Suppose that diploid cells of the seminiferous tubules encounter errors during the cell cycle and mitosis. This results in the primary spermatocytes having a 4n number of chromosomes. Assuming that meiosis proceeds normally, which of the following would be true?
A) Sperm cells would have an n number of chromosomes. B) Sperm cells would have a 2n number of chromosomes. C) Secondary spermatocytes would have a 4n number of chromosomes. D) Secondary spermatocytes would have an n number of chromosomes.