Explain how aerobic respiration and anaerobic are connected and what materials are cycled back and forth between them

In anaerobic respiration, each molecule of glucose yields only two ATP molecules. Compare this with the 38 molecules obtained in aerobic respiration.

Most of the energy is still locked up in the Lactic acid or ethanol molecules. In animal cells, the energy in Lactic acid can be released if oxygen is supplied to the cell. During vigorous activity, muscle cells do not get sufficient supply of oxygen to meet their requirement.

As a result, anaerobic respiration occurs to temporarily supply energy, and lactic acid is produced.

Lactic acid accumulates in the cells up to a certain level. Beyond this level, the muscle cells cannot work and this is know as muscle fatigue. The muscle cells are said to have incurred an 'oxygen debt' since they have used up more energy than was possible from the oxygen supplied to them.

During the resting stage, the muscle cells respire aerobically and 'pay back' the oxygen debt by converting the Lactic acid to pyruvic acid.

This is the connection.

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