Why is more than one reproductive isolation barrier needed to completely isolate a species?

What advantages does a pedigree have over a written passage?

What are the student's observations and inferences before he starts his investigation?

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