Which of the following statements are true?
gene flow and genetic drift are random
gene flow, genetic drift, and natural selection are random
gene flow and genetic drift are nonrandom
gene flow, genetic drift, and natural selection are random
gene flow and natural selection are nonrandom while genetic drift is random
gene flow and genetic drift are nonrandom while natural selection is random

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

straight probes are used primarily for measuring flow as it is approaching the test area. its geometry allows the probe to be mounted so that it is in the direct line of airflow.