In active transport:
a. molecules move across the plasma membrane by crossing the lipid bilayer directly, rather than by using a transport protein.
b. the plasma membrane forms a pocket that pinches inward, forming a vesicle that contains material from outside the cell.
c. no energy input is required from the cell.
d. a vesicle inside the cell fuses with the plasma membrane and releases its contents outside the cell.
e. molecules move across the plasma membrane against their concentration gradient.

The correct option is: e. molecules move across the plasma membrane against their concentration gradient

Explanation:

Active transport refers to the movement of the particles or molecules from higher concentration to lower concentration, across the plasma membrane of a cell. This transport requires cellular energy as the movement of the molecules is against the concentration gradient.

Active transport can be divided into primary and secondary active transport.

increase soil erosion                                             reduce soil erosion

cattle grazing                                                         hydroseeding

deforestation                                                         contour plowing

                                                                                planting vegetation

plant roots basically hold the top soil

together and stop soil erosion because

in such situation top soil is not removed

during flood but cattle grazing causes

soil erosion because cattle consume the

grasses and herbs and top soil is exposed.

same situation occurs because of

deforestation, the trees and plants are cut

down to expose top soil which causes soil

erosion

b) the inside picture would look at a very high temperature in a very low ph