The organization of tissues in Figure 34-2 is characteristic of:
a. a stem.
b. a spine.
c. a leaf.
d. a bulb.
e. a bud scale.
C
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What molecule contributes to the red color of slow-twitch muscle fibers?
A. myoglobin B. ATP C. glycogen D. lactic acid E. fatty acids
What are structural colors produced by in fish?
a. Biochromes b. Iridophores c. Pigments d. Chromatophores
Dragonflies that ranged in size from those smaller than today's dragonflies to some with wingspans of
75 centimeters (2.5 feet) appeared during the:a. Cambrian period. b. Ordovician period. c. Silurian period. d. Devonian period. e. Carboniferous period.
Which of the following accurately compares active hyperemia to reactive hyperemia?
A) One is caused by an increase in metabolites, the other to a decrease in perfusion pressure. B) One is an increase in blood flow, the other is a decrease. C) One is caused by increased metabolic activity, the other in response to an increase in metabolites from an occlusion to blood flow. D) One involves vasodilation, the other vasoconstriction. E) One is an intrinsic response, the other an extrinsic response