As a young biologist, Charles Darwin had expected the living plants of temperate South America would resemble those of temperate Europe, but he was surprised to find that they more closely resembled the plants of tropical South America. The biological explanation for this observation is most properly associated with the field of

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#Question id: 23872

#Unit 13. Methods in Biology

Genetic engineering is being used by the pharmaceutical industry. Which of the following is not currently one of the uses?

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#Question id: 19493

#Unit 4. Cell Communication and Cell Signaling

Enhanced disease susceptibility is caused in

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#Question id: 2299

#Unit 2. Cellular Organization

_______ are plastids containing carotenoid pigments, and _______ are plastids containing starches.

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#Question id: 3420

#Unit 11. Evolution and Behavior

Following are key points about the effect of genetic drift:

A. Genetic drift is significant in small populations.

B. Genetic drift can cause allele frequencies to change in a pre-directed way.

C. Genetic drift can lead to a loss of genetic variation within populations.

D. Genetic drift can cause harmful alleles to become fixed.

Which one of the following combination of the above statements are true?

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#Question id: 11354

#Unit 10. Ecological Principles

C.B. Huffaker was able to maintain experimental populations of predator and prey (using species of mites) that exhibited recurring oscillations. What feature of Huffaker's experimental design was critical to this outcome?