At sea level, air pressure is 760 mm hg and the partial pressure of oxygen hg. at higher elevations, air pressure is reduced, and the partial pressure of oxygen / the same / higher) even though the percent of oxygen in the air / the same / higher).

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

Which chemical equation is unbalanced? which chemical equation is unbalanced

Explain why scientists use the word dominant for certain traits.