1) the main difference between a prokaryotic cell and a eukaryotic cell is
a) the ability to grow.
b) the ability to reproduce.
c) the presence of nucleic acids.
d) the presence of a true nucleus.
2) which type of cell contains dna enclosed in a nucleus?
a) centriole
b) eukaryote
c) plasmid
d) prokaryote
3) viruses cannot
a) be crystallized.
b) live in bacteria.
c) reproduce

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

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.