Cytotoxic T cells and NK cells that form during a cell-mediated immune response are helpful in addressing .
a. atherosclerosis
b. HIV
c. cancer
d. rheumatoid arthritis
e. allergies

Liquid water turns into water vapor at which step in the water cycle? a. precipitation o b. water run off c. evaporation d. condensation

Look at the following answer choices and determine which belongs in the both category. testable, can be disproven explains natural phenomena, has evidence to support it prediction, tentative, one or more scientists working together well established, many different scientists working independently, highly reliable

Which of the following is not a food produced in rainforests? a) coffee b) cocoa c) avocados d) wheat