Dinosaurs were alive when primates first arose
1.True
2.False
1
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The ability of TCÂ 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
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
Which of the following vitamins is not stored in fat?
a. A b. K c. C d. D e. E
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