"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.

explain why the change in ice mass is resulting in a decline in the penguin populations."

Nextend of semester testsubmit testreader toolsinto-samosquitoes in tropical regions can carry and transmit the malaria parasite to humans. the mosquitoes used to be killed in these regions by sprayingthem with the insecticide ddt. the mosquitoes that were earlier sensitive to ddt are now not killed by ddt and grow and multiply even in the presenceof ddt. how can you explain this phenomenon? oa.all of the mosquitoes must have undergone a mutation for ddt resistance and produced similar kind of resistant offspring, whichevolved into a ddt resistant population.b.some of the mosquitoes must have undergone a mutation for ddt resistance and produced similar kind of resistant offspring, whichwould have been selected by nature,oc.all of the mosquitoes must have slowly increased their tolerance level to ddt and ultimately would have become completely resistantto ddtresetnextnext