People with type o blood are considered "universal donors" for transfusions because people with type o blood are considered "universal donors" for transfusions because they usually have very strong red blood cells their red blood cells lack a and b surface antigens their blood lacks a and b antibodies their blood is plentiful in a and b antibodies

Elephants in the savanna regions of africa dig holes in dried up river beds to reach water lying just below the surface. these holes provide drinking water for other animals as well. so, without the elephants, many animals might otherwise die from lack of water during the dry season. the location in which the elephants live is an example of a/n and the role they play in creating water holes is an example of a a) ecosystem; habitat b) community; niche c) habitat; niche d) niche; habitat

In which of the following relationships is one organism always benefited while the other organism is always harmed

What is the most common structure of volcanoes?