As much as 50 percent of a soil’s volume is

a. air.
b. iron.
c. manganese.
d. water.


A

Biology & Microbiology

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The bacteria that cause botulism cannot live in the

presence of a. carbon dioxide. b. oxygen. c. glucose. d. water. e. ATP.

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DNA sequencing suggests that among the green algae, the ________ are most closely related to land plants.

A. Stoneworts B. Volvox C. Ulva D. Chlamydomonas E. Spirogyra

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Every atom of the same element has an equal number of electrons and protons

Indicate whether the statement is true or false

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What contributes to antigenic shift in influenza viruses?

A) worldwide distribution of the virus B) a segmented genome C) attachment spikes D) ease of virus transmission E) different virus subtypes

Biology & Microbiology