Vaccines are used to prevent illness. most vaccines are given as injections or shots. before a doctor gives a patient a shot, the doctor wipes the skin with rubbing alcohol. what is the main reason for wiping off the skin?

Body temperature is tightly regulated in mammals for example when external temperatures drop too much the body of a mammal responds by in order to its core temperature?

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

Which of the following explains why a tree is often used as a model to represent the principle of common descent