If polar bears and brown bears can breed it means that they come from a common ancestor population. Now imagine that this ancestor population had brown coats and lived in forests that were covered in snow in the winter and that were close to seas that iced over in winter.

Describe a process by which some of the ancestor population could have become today's brown bears and some polar bears.

What must be done to breed dogs for a partical trait

Where can dna be found in a prokaryotic cell

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