What fraction of all of the organic carbon on Earth results from microbial fixation of carbon dioxide in the oceans?

A. About 1/2
B. About 3/4
C. About 1/4
D. About 1/8


Answer: A

Biology & Microbiology

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a. developing the polio vaccine b. developing a cure for malaria c. understanding fertilization d. developing a cervical cancer vaccine e. understanding cloning

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Which began first?

A) Multicellular life in the ocean B) Multicellular life in fresh water C) Plants colonizing the land D) Animals colonizing the land

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Exotoxins such as botox and other are made of:

A. Protein B. Lipids C. Carbohydrate D. Lipopolysaccharide

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Explain what is meant by host range, what governs host range, and what is meant by tissue tropism.

What will be an ideal response?

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