Which blood type is considered the universal donor? why can this blood type be given to all other blood types?

Which of the following is not a main characteristic that scientists focus on when determining which kingdom an organism belongs to

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?

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