Which is a correct statement about mutations?
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a. mutations ensure alleles never change.
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b. mutations decrease variety in the population.
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c. mutations are always bad.
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d. mutations increase variety in a population.

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?

With the word calcite wich completes the analogy mineral, erosion, marble, or aragonite

Awoman whose sister tested positive for a specific mutation in the brca1 gene, which increases the risk for breast and ovarian cancer, is found not to have that mutation but does have a mutation of unknown significance near the known mutation site. how should this woman be counseled? select one: a. she should be informed that her risk for breast cancer is greater than the general population but not as great as her sister’s risk. b. she should be informed that because she does not have the mutation, her risk for breast cancer is not greater than that of the general population. c. she should be informed of her gene mutation status and be presented with all the available prophylaxis options and reconstruction options. d. she should be informed that she does not have the specific mutation but that because another mutation is present she should be vigilant about screening