Plants known as "annuals"—that is, those that complete their entire life cycle in one growing season—are found in which of the following groups?
a. angiosperms and ferns
b. ferns and mosses
c. gymnosperms only
d. angiosperms only
e. ferns only
Ans: d. angiosperms only
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Eutherian mammals are uniquely defined by:
A. having a placenta B. longer gestation periods because of more highly developed placentas C. having fur D. the young developing in a pouch E. laying eggs
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What do we mean when we say that facilitated diffusion is specific?
a. A protein will transport specific molecules. b. One specific integral protein per membrane is involved in facilitated diffusion. c. Only specific hydrophobic molecules can be transported. d. The energy molecule ATP is specifically required for transport.
The white blood cells primarily responsible for adaptive immunity are
A) NK lymphocytes and neutrophils. B) B lymphocytes and T lymphocytes. C) macrophages and eosinophils. D) macrophages and neutrophils. E) neutrophils and dendritic cells.