Primary growth involves a(n):

a. increase in length.
b. increase in girth.
c. production of secondary xylem.
d. production of cork cells.
e. division of vascular cambium cells.


a

Biology & Microbiology

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Insertion or deletion of a nucleotide in a gene causes a type of mutation called a(n) ____________________ mutation

Fill in the blank(s) with correct word

Biology & Microbiology

Most enzymes are composed of ____

a. RNA only b. protein only c. substrate only d. RNA and protein e. protein and substrate

Biology & Microbiology

Which graph shows that species diversity is

much less at the equator than at 60 degrees north latitude? a. A b. B c. both d. neither e. not enough data is provided to answer the question

Biology & Microbiology

Song and bright colors make male birds conspicuous to predators. The large, gaudy tail of the peacock may be a hindrance in activities such as feeding and flight. Yet these features evolved because of:

a) sexual selection. b) sex-differential survivorship. c) kin selection. d) reciprocal altruism. e) artificial selection.

Biology & Microbiology