A macrophage is also referred to as an antigen-presenting cell. explain why that is an appropriate term.

Which of the following can be accurately said about climax communities? A. Climax communities are always stable. B. Restoration of the original climax community may not always happen. C.

What are tears made up of (I know it's a liquid)

Which are products of nitrogen fixation

Each step in a food chain that demonstrates the transfer of energy is called a?

What is an example of eukaryote

If you push very hard on an object but it does not move, have you done work

How might an amino acid change at a site distant from the active site of the enzyme alter the enzyme's substrate specificity? A. By changing the enzyme's stability B. By changing the enzyme's location in the cell C.

Which of the following persons has the highest risk for diabetes, hypertension and heart disease? a. A man with a BMI = 29 and a waist circumference = 37 inches b. A woman with a BMI = 27 and a waist circumference = 36 inches. c.

Which of the molecules has the sugar deoxyribose and phosphate groups in it's backbone?

If your blood sugar level is low from skipping lunch, what reaction (dis - cussed in this exercise) will occur in your liver cells? write out the reaction and put the name of the enzyme over the reaction arrow.