Climate change and an increasing amount of impermeable surfaces due to urbanization has resulted in:
A. eutrophication.
OB. increased river flooding.
C. the Clean Water Act.
D. the introduction of DDT into the water system.

Put the following steps of the convection process in the correct order. 1. gravity pulls cooler matter downward. 2. the matter expands and decreases in density. 3. an up-and-down flow of matter produces a convection current. 4. matter is heated. 5. warmed matter is forced upward. question 2 options: a) 4, 2, 5, 1, 3 b) 2, 4, 3, 1, 5 c) 3, 2, 5, 4, 1 d) 1, 4, 2, 5, 3

Contrast how pollination is different among gymnosperms and angiosperms.

Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this