Biologists divide mechanisms of reproductive isolation into
A. sexual and geographic.
B. prezygotic and sexual.
C. postzygotic and geographic.
D. sexual and postzygotic.
E. prezygotic and postzygotic.
E. prezygotic and postzygotic.
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Gamma irradiation has been used to sterilize certain types of foods. There are, however, certain limitations on its effectiveness. One of these is that it will only work on
A. foods that are not in metal cans. B. moist foods. C. dry foods. D. It is effective with all foods.
__________ fights infection by increasing the metabolic rate. Fill in the blank(s) with the appropriate word(s)
Cyclic electron transport is different from noncyclic electron transport in that cyclic electron transport
produces NADPH. __________________ Indicate whether the statement is true or false.
Which is NOT true of prokaryotes?
A) They contain ribosomes. B) Their cells contain a true nucleus. C) Their genes contain exons. D) They include bacteria. E) They are single-celled organisms.