Which of the following might explain the variation in this count from year to year?
a. annual weather conditions
b. competition
c. species diversity
d. annual weather conditions and competition
D
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What is thought to help explain the evolution of the blood clotting mechanism?
a. constant mutations b. direct response to environmental factors c. gene duplication d. sharing of gene pools between species e. inbreeding
Consider how many of each type of atom is present in a single molecule of glucose. Which of the following pairings is incorrect?
a. H = 12 b. O = 12 c. C = 6
A one-way relationship in which one species
benefits at the expense of another is a. commensalism. b. competitive exclusion. c. parasitism. d. obligate mutualism. e. a neutral relationship
Suppose you are a botanist and you discover a plant that has xylem and phloem. Into which group should you NOT classify this plant?
a. ferns b. angiosperms c. gymnosperms d. bryophytes