How long ago did the first gymnosperms evolved?

A. 360 million years ago
B. 360 thousand years ago
C. 36 million years ago
D. 36 thousand years ago


Answer: A

Biology & Microbiology

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On which continent would you have seen the very earliest members of Homo sapiens?

A. Europe B. Africa C. Australia D. Asia

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____ is a random change in allele frequency

over time that is brought about by chance.

a. Genetic drift b. Gene flow c. Natural selection d. Disruptive selection e. Balanced polymorphism

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The hydrophilic regions of a membrane protein are most likely to be found

A) associated with the fatty acid region of the lipids. B) in the interior of the membrane. C) exposed on the surface of the cell membrane. D) only in muscle cell membranes. E) attached to carbohydrates and facing the interior of a cell.

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What is meant by the term trophic level?

What will be an ideal response?

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