In a zygotic life cycle
A. Haploid cells form gametes that fuse to produce thick-walled diploid zygotes capable of surviving stressful conditions.
B. There is an alternation of generations.
C. The zygote undergoes meiosis and produces many heat-resistant spores that increase the population size and aid in dispersal.
D. Haploid cells form spores that in turn fuse to produce thick-walled zygotes capable of surviving stressful conditions.
A. Haploid cells form gametes that fuse to produce thick-walled diploid zygotes capable of surviving stressful conditions.
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Peristalsis
a. is an involuntary smooth muscle response to swallowing. b. is a voluntary smooth muscle response to swallowing. c. is controlled by muscles surrounding the trachea. d. occurs when food enters the airway instead of the esophagus. e. is both b and c.
Fish have _____ chambered hearts
A) 1 B) 2 C) 3 D) 4
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Indicate whether the statement is true or false
In the cAMP pathway, the G protein activates ____
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