Which are examples of how farmers can prevent topsoil erosion? check all that apply:
a. Pound the into clay using an earth compaction
b. Carve steep hillsides into flat steps
c. Plow the topsoil often
d. Always have crops growing

In the african savanna,more wildebeests are born than the environment can support. which is most likely to happen over a period of years as a result

What causes an unsaturated fatty acid to have a different shape than a saturated fatty acid? o a. unsaturated fatty acids have more hydrogen atoms. o b. unsaturated fatty acids have double carbon bonds. o c. unsaturated fatty acids have more nitrogen atoms. o d. unsaturated fatty acids have single carbon bonds.

Explain two reasons you think it is important for scientists to search for new ways to treat cancer