The evolutionary effects of genetic drift are greatest when _____.
A) the population size is large
B) intraspecific competition is intense
C) the population size is small
D) intraspecific competition is weak
E) sexual selection occurs
Ans: C) the population size is small
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Suppose that a dinosaur's body was not preserved in a way that produced a fossil; however, some of its footprints made during its life were preserved. These are considered what type of fossil?
a. false b. impression c. indented d. trace e. print
Cytoplasmic division in animal cells involves
all EXCEPT a. formation of a cell plate. b. a contractile ring mechanism. c. a deepening cleavage furrow. d. a ring of actin filaments under the plasma membrane at the equator. e. ATP.
Leukemia refers to several types of blood cancer in which there is an abnormally high number of abnormal or immature white blood cells in the blood.
a. true b. false
Which of these would be an example of a NON-scientific study?
A) A company uses different advertising methods for a product to determine which one produces the most sales. B) NASA sends tadpoles up in the space shuttle to see how gravity affects their development. C) A study determines differences in the species composition in two parks. D) Consumers are asked which tomato variety produces the best-tasting spaghetti sauce. E) People are immunized with different vaccines to determine their relative effectiveness against the flu virus.