In adults, where are the stem cells that make new cells to protect the intestines?

The most economically useful unicellular fungi are

Simon and his friends are working on an experiment to determine the most common blood type group in California. Which of these methods would be the best form of data collection? a.

Which phase of cardiac action potential is caused by closure of the fast sodium channels? phase 0 phase 1 phase 2 phase 3?

When a neuron is excited by other neutrons but not enough to fire even though electrical charge across membrane changes, this reflects: a) a polarized neuron b) weak action potential c) neuron depolarized but not enough to fire.

How many different forms of lipids are commonly found in food?

What do amoeba proteus, dinoflagellate, and euglena viridis have in common? a. they all can move and make their own food b. they all can move and use eye spot to locate food c. they all can move and be heterotrophic d.

How is a scientific hypothesis best evaluated?

The overall population of a species decreased. What could have occurred to make this happen? The immigration rate increased, while the death rate decreased. The birth rate decreased, while the death rate increased.

Which of the following terrestrial biomes cannot be found in the United States? A: temperature deciduous forest B: tundra C: desert D: grassland/prairie

Which of these food sources does the bald eagle not feed on? plants fish carrion mammals