Toxins can lead to:
a. increased harvestable metals in the ocean.
b. reduction in anaerobes in the sediment.
c. reduction in primary production.
d. increase in primary production.
e. increase in individual size and growth rates.
C
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Which of the following are characteristics of self-compatible plants?
A. They are physically isolated. B. Their pollinators are common. C. They are wind pollinated. D. Carpels and stamens are on separate plants.
If reproduction occurs early in the life cycle, what occurs?
a. the population growth rate increases b. the population size declines c. the population size is not affected d. the generation time increases e. the growth rate remains unchanged
____ contain identical DNA sequences and are held together by ____ during mitosis
a. Daughter chromosomes; hydrogen bonding b. Daughter chromosomes; ionic bonding c. Sister chromatids; spindle fibers d. Sister chromosomes; histone proteins
e. Sister chromatids; cohesin proteinsResearch done in the 1930s and 1940s—now known as the modern or evolutionary synthesis—included ex-perimental work in genetics that demonstrated:
a. genes are particulate and do not blend. b. mutations are one source of genetic variation. c. there is no difference between genetic variants that generate large or small phenotypic varia-tion. d. All of the above.