Which of the following is a common way in which both phosphorus and sulfur are deposited on land?
a. rock weathering
b. condensation
c. sublimation
d. photosynthesis
a. rock weathering
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Mitochondrial Eve was
A) fossil evidence of the Biblical Eve. B) a figurative first woman who had a mtDNA sequence that could have given rise, by mutation, to all modern human mtDNA. C) a hominid who had features of both australopithecines and Homo. D) a famous female paleontologist who has studied several fossil hominids in Ethiopia.
Fast and ____________________ muscle fibers contract rapidly but do not produce sustained contractions, whereas slow and ____________________ muscle fibers contract slowly but can produce energy for long periods of time via aerobic respiration
Fill in the blank(s) with correct word
Phytochemicals from soy may help
a. high blood pressure. b. increased incidence of athletes foot. c. cause macular degeneration. d. lower cholesterol. e. none of these.
One secondary spermatocyte ultimately produces:a
one mature sperm. b. two mature sperm. c. four mature sperm. d. eight mature sperm. e. an indeterminate number of sperm