Which of the following might trigger erythropoiesis? a. moving to a lower altitude b. an increased number of RBCs c. hypoxia of EPO-producing cells d. decreased tissue demand for oxygen

The diffusion of water across a selective permeable membrane is called what

How small is a human skin cell

Lactose is milk sugar, and as infants, humans produce substantial amounts of the lactase enzyme to digest it.

In order to make room for the increasing population, new cities and towns are formed. A side effect of the construction of these cities and towns is that A. fewer people are able to live comfortably. B.

Which conditions must be regulated for the body to be stable and function properly? Check all that apply. body mass body temperature amount of exercise amount of water in the body amount of sugar in the body

She is the northern hemisphere tilted toward the sun?

Describe how the ocean plays a role in stabilizing Earth's weather conditions

Q: A: Which numbered organelle produces ATP during cell respiration

From earliest to most recent, what is the correct order in which organisms appear in the fossil record? a. dinosaurs, invertebrates, reptiles, mammals b. invertebrates, amphibians, dinosaurs, mammals c.

Is it possible for technological advancements to have both positive and negative effects on the world