Moving a spring toy up and down will create what kind of wave? A. electromagnetic

B. transverse

C. surface

D. longitudinal

Contrast how pollination is different among gymnosperms and angiosperms.

Which of these is not an obstical to the future of space exploration? fundingresearch ideas technologytime

What is a food chain? a. different animals located in different communities b. energy transferred from the sun to plants and then to a series of living things c. rows of crops, such as lettuce, in a field d. animals using one another as food for energy and growth