A species' fundamental niche:
A. is smaller than its realized niche.
B. is what is actually occupied by that
species.
C. is determined by competition between
species.
D. has the necessary resources and
conditions for survival.
E. is always occupied in full by most species.
D
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The atomic number corresponds to the number of ________ in a specific element, while the atomic weight corresponds to the number of ________ in a specific element.
A. protons; protons and neutrons B. protons and neutrons; neutrons C. protons; neutrons D. neutrons; protons
HIV attacks a variety of cell types but the most critical are
A. red blood cells. B. nerve cells. C. platelets. D. T helper cells.
Nervous tissue contains which two types of cells?
A. muscle fibers B. adipocytes C. fibroblasts D. neurons E. neuroglia
Polyploidy:a
may be the result of more than one sperm fertilizing an egg. b. is not lethal in humans. c. may be the result of the failure of a chromosome to separate during meiosis. d. can be due to nondisjunction for a chromosome. e. is the mechanism of dosage compensation.