How do conservation tillage practices in agriculture benefit the soil? a. they increase soil erosion rates. b. they decrease water absorption. c. they decrease water storage. d. they increase soil nutrient levels. select the best answer from the choices provided a b c d

In dna, only the_ varies from one nucleotide to another. base phosphate sugar amino acid

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

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?