Dinosaurs were alive when primates first arose

1.True
2.False


1

Biology & Microbiology

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The ability of TC cells to initiate apoptosis in virally-infected cells and cancer cells is dependent on their ability to produce ________ and ________; proteins that punch holes in the target cell membrane.

A. antibodies; interferons B. interleukin-1; interleukin-2 C. interferon; interleukins D. perforin; granzyme

Biology & Microbiology

The chemical structure of chlorophyll is based on a complex organic ring structure, with a long hydrophobic side

chain and a(n) ____ atom in the center of the ring.

a. carbon b. manganese c. magnesium d. iron e. nitrogen

Biology & Microbiology

Which of the following vitamins is not stored in fat?

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

Biology & Microbiology

The bottleneck effect, when a population is suddenly reduced, can lead to genetic drift. Which of the following is least likely to result in the bottleneck effect in a population?

A) flood B) habitat destruction C) predation D) immigration

Biology & Microbiology