(i couldn't find science)
which statement about a dichotomous key is true?
1. a dichotomous key is based on the temporary actions of an organism.
2. a dichotomous key may include a question that has three or more answers.
3. a dichotomous key may have a group with no organisms in it.
4. a dichotomous key is complete when each organism stands alone.

In attempt to solve the working problems created by the industrial revolution, the united states and many countries in europe considered and/or adopted

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

Which of the following are the functions of the integumentary system? yadda-yadda, the 1st answer is the brainliest. : )