A biome is most specifically defined as ____

a. a vegetation type plus its associated microorganisms, fungi, and animals
b. a biological community and the physical environment with which it interacts
c. the total dry weight of plants present in a specific area at any given time
d. an assemblage of species living in the same place
e. a group of organisms of the same species living together at one time


ANSWER: a

Biology & Microbiology

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Two species of frog mate in the same pond. One breeds in early summer and one in late summer. This is an example of what kind of reproductive isolation?

A. pre-zygotic, behavioral isolation B. pre-zygotic, temporal separation C. pre-zygotic, ecological separation D. post-zygotic, temporal separation E. post-zygotic, ecological separation

Biology & Microbiology

Which statement correctly describes horizontal gene transfer?

a. Conjugation, transformation and transduction are all forms of horizontal gene transfer. b. Conjugation and transformation are forms of horizontal gene transfer, but transduction is a form of vertical gene transfer. c. Eukaryote-eukaryote transfers of nuclear genes are most common. d. Prokaryote-eukaryote transfers of nuclear genes are most common. e. Partial diploids always result from horizontal gene transfer.

Biology & Microbiology

Which characteristic will NOT strengthen the validity of a theory?

a. repetitions of experiments b. increased observations c. time after the experiment d. faith in the experiment e. confirmation by many scientists

Biology & Microbiology

Species richness is a measure of both the number of species and the relative importance of each species based on its

abundance, productivity, or size. Indicate whether the statement is true or false.

Biology & Microbiology