Biogeochemical cycles involve
A. the movement of chemicals through ecosystems.
B. all chemical elements plus light energy.
C. just those nutrients that are limiting for organisms.
D. the nutrients used solely by primary producers
E. None of the answers are correct.
Answer: A
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The fact that genes associated with altruism are favored by natural selection if they lead to the reproductive success of
an altruist’s closest relatives is called _____. a. the theory of inclusive fitness b. survival of the fittest
c. evolution d. inbreeding e. selective mating
The disease in the above photograph is caused
by a. syphilis. b. gonorrhea. c. chlamydia. d. all of these. e. none of these
The different proteins characteristic of breast cancer subtypes can be used as _____ for proper diagnosis and
treatment.
a. prebiotics b. biomarkers c. DNA clones d. bioinformatic data e. physical maps
Most density-dependent factors show negative feedback relative to population size. Which one of the following is more likely to show positive feedback relative to population size?
A. mortality in large populations B. competition in small populations C. competition in large populations D. fecundity in small populations E. fecundity in large populations