Vascular tissue cells with long, tapered, overlapping ends are known as ____
a. sclerenchyma
b. tracheids
c. collenchyma
d. parenchyma
e. vessel elements
ANSWER: b
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The elongation of stems is stimulated by
A. auxin only. B. gibberellin only. C. ethylene only. D. auxin and gibberellin. E. auxin and ethylene.
The suffix -phore is derived from a Greek word meaning
a. branch. b. moss. c. liverwort. d. male.
Which of the following is not a characteristic of a sustainable society?
A. mass transit B. multi-use farming C. recycling and composting D. integrated pest management E. draining of wetlands for housing
Which of the following mechanisms is not directly involved in inactivating an activated RTK?
(a) dephosphorylation by serine/threonine phosphatases (b) dephosphorylation by protein tyrosine phosphatases (c) removal of the RTK from the plasma membrane by endocytosis (d) digestion of the RTK in lysosomes