Grasses develop
a. a taproot.
b. fibrous roots.
c. no root cap.
d. no root hairs.
B
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Which one of the following controls drives, instincts, and emotion?
A. thalamus B. cerebrum C. limbic system D. cerebellum
Dopamine derived from the hypothalamus is the prominent hormone controlling pituitary prolactin secretion. Dopamine inhibits prolactin secretion. What do you predict would happen if the pituitary were removed from the base of the brain and transplanted to some distant place in the body (for instance on top of the kidney), such that dopamine could no longer regulate prolactin secretion? You can assume that the transplanted pituitary will be exposed to a ready supply of blood vessels.
A. Dopamine secretion would increase. B. Dopamine secretion would decrease. C. Prolactin secretion would decrease. D. Prolactin secretion would increase. E. Both dopamine and prolactin secretion would decrease.
The life cycle of a zygomycete differs
markedly from that of animals because in this fungus a. a sexual stage is absent. b. mitosis occurs in the haploid growth stage. c. there is no fusion of nuclei. d. meiosis occurs to produce the haploid growth stage. e. a diploid stage is absent
Which fungal phylum includes the black bread mould Rhizopus stolonifer and the dung-infesting fungi of the genus Pilobolus?
a. Basidiomycota b. Chytridiomycota c. Glomeromycota d. Zygomycota