What is the maximum number of alleles that a given human adult (with 23 pairs of chromosomes) can have at any particular genetic locus?
a. 1
b. 2
c. 23
d. 46
e. there is no maximum number.

Which of the following are false concerning microbes? a. microbes generate oxygen through photosynthesis. b. the primary role of microbes on the planet involves causing disease in animals and humans. c. microbes produce vitamins in the intestines. d. microbes play a role in breaking down waste and decomposing dead organisms.

What causes eclipses? check all that apply. earth's rotation on its axis moon's shadow covering the sun earth's shadow covering the moon earth's orbit and moon's orbit occasionally aligning the moon and sun's gravity pulling in the same direction

Which worm has eyespots that are used to detect light? a fluke b marine worm c planarian d tapeworm