When the pesticide, ddt, was heavily used plants would absorb the residues that washed off into the waterways. small fish consumed these plants and medium fish would consume the small fish. even larger fish would consume the medium fish and bald eagles would consume these large fish in significant quantities. a chemical in the ddt interfered with the process of making strong eggshells. as a result, the bald eagle population declined drastically. this is an example of

Which would be the outcome in a fertilized egg if the process of meiosis did not occur? twice as many chromosomes as the parents half as many chromosomes as the parents same number of chromosomes as the parents triple the number of chromosomes as the parents?

An ecologist is studying the effects that a population of predators is having on a population of a prey. he used data from the field to produce this graph. which conclusion can draw from the graph?

African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.