Which soil horizon is composed of organic litter?

a. A
b. B
c. C
d. D
e. E


Answer: a

Biology & Microbiology

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Bioinformatics includes _____. I. using computer programs to align DNA sequences II. creating recombinant DNA from separate species III. developing computer-based tools for genome analysis IV. using mathematical tools to make sense of biological systems

A) I and II B) II and III C) II and IV D) I, III, and IV

Biology & Microbiology

Aequorin, a protein produced by jellyfish and ctenophores, can be used to detect the release of Ca2+ ,

an important control element in many eukaryotic cells, into the cytosol by

a. releasing a burst of light. b. depolarizing the cell membrane. c. causing a conformational change in the shape of G proteins. d. phosphorylating tyrosine. e. More than one answer is correct.

Biology & Microbiology

The relationship between plants and their pollinators is a good example of parasitism.

Answer the following statement true (T) or false (F)

Biology & Microbiology

If a great volcano blew up and almost everyone nearby was killed, we would say that this was due to a(n) ________ regulating factor

Fill in the blank(s) with correct word

Biology & Microbiology