"over the past few decades, researchers have observed declining numbers in two species of penguins native to the west antarctic peninsula. new evidence is pointing to a decline in their food supply as the primary cause for the recent drops in their numbers. these penguins feed on krill, small animals that grow and develop under ice masses. the graphs below show data related to two factors: atmospheric carbon dioxide (co2) levels and antarctic ice mass. the diagram of a generalized antarctic food web illustrates the role of the penguins.

state one specific way in which humans might have caused the changes in atmospheric co2 levels"

Check all that apply diatoms are marine algae that have a shell made of silica, what are some of the uses of the silica shell after the diatoms die? 1.the shells make up the diatomaceous earth used in filters 2.it can be used as an ingredient in abrasives 3.they are used in food products 4.the shells can be used in some insulating materials

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

Will mark brainliest. (20 points) many have pigments structures known as eyespots that detect direction of light. a. b. archaebacteria c. protists d. none of the above