Within six months of effectively using methicillin to treat S. aureus infections in a community, all new S. aureus infections were caused by MRSA. How can this best be explained?

A) A patient must have become infected with MRSA from another community.

B) In response to the drug, S. aureus began making drug-resistant versions of the protein targeted by the drug.

C) Some drug-resistant bacteria were present at the start of treatment, and natural
selection increased their frequency.

D) S. aureus evolved to resist vaccines.

Pretty sure it’s C, but I’m not sure.

c. some drug-resistant bacteria were present at the start of treatment, and natural selection increased their frequency

Explanation:

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

archaebacteria are found in in forest soil.

hope i spelled it right lol

hope i

-lavira: )