The enzymes pepsin and trypsin don't work at the pHs of what?

Explain why some scientific theories are changed over time

A hill is made of rock particles of different sizes. Which of these agents of erosion probably caused the hill to form? A. Glacialice B. Waves C. Wind D. Flowing water

What is oxygen made of?

Imagine you are making a pizza, you start of with the dough for the crust in a large ball. You then begin to roll out the pizza dough with a roller. The result is flattened out dough. In this scenario, what stimulates the strain found in some rocks?

What is the purpose of the fruit that develops on a flowering plant

What would you expect to happen if sea otters were removed from this food web? Check all that apply. The population of elephant seals would decrease. The population of kelp crabs would increase. The population of kelp would increase.

When blockages in the bloodstream read the Brian it can cause blank?

A gazelle is born with slightly longer legs which allow it to run faster than the other gazelles in the herd. This adaptation came may have come about because a. the gazelle needed to be able to run faster. b.

In a population of deer mice, the allele for white hair is recessive and the allele for brown hair is dominant.

What makes a molecule a saturated fat?