Variation among pre-cells was due to ________

A) genetic drift
B) natural selection
C) the bottleneck effect
D) mutation


D

Biology & Microbiology

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Which latitude will have the most hours of daylight on the summer solstice?

a. 0º (the equator) b. 30º north c. 45º north d. 60º north

Biology & Microbiology

The layering of sedimentary deposits is called

a. stratification. b. saponification. c. fossilization. d. petrifaction. e. putrefaction.

Biology & Microbiology

Which of the following investigators was (were) responsible for the following discovery? In DNA from any species, the amount of adenine equals the amount of thymine, and the amount of guanine equals the amount of cytosine

A) Alfred Hershey and Martha Chase B) Oswald Avery, Maclyn McCarty, and Colin MacLeod C) Erwin Chargaff D) Matthew Meselson and Franklin Stahl

Biology & Microbiology

The process of phagocytosis involve all of the following EXCEPT

A) chemotaxis. B) secretion of cytotoxins. C) adhesion. D) elimination. E) vesicle fusion.

Biology & Microbiology