Variation in a trait is a required condition for natural selection to act on a population for that trait. assuming a population of organisms started with only one form of trait, what are two ways variation in the trait could be introduced into the population? explain your answer.

The graph shows the amount of global warming happening in different ecosystems. which populations of organisms will likely decline the most as a result of climate change, and why? a.coral reefs because of the loss of the symbiotic algae living within their bodies b.penguin populations because the fish they eat will move into warmer waters c.mountain-dwelling birds because rising sea levels will relocate their food sources d.large cats in the rainforest because of decreased habitat loss for their prey