Protists that are part of a(n) _____ are integrated with other cells, but remain self-sufficient
a. multicellular organism
b. colonial organism
c. contractile vacuole
d. algal bloom
e. pathogenic life cycle
ANSWER: b
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Which of the following is a characteristic of conifers?
a. needle-like leaves b. palm-like leaves c. fan-shaped leaves d. broad leaves
The study of behavior in natural environments from an evolutionary perspective is called:a
ethology. b. animal behavior. c. behavioral ecology. d. behavioral ethology. e. direct fitness.
When a Xenopus oocyte is stimulated with the hormone progesterone, it enters meiosis and arrests at ______, awaiting fertilization by a sperm.
a. prophase I b. metaphase I c. prophase II d. metaphase II
If each number represents a population, this illustration provides an example of:
a. a peripherally isolated species. c. reproductive isolation. b. a hybrid zone. d. a ring species.