Science is a process for producing knowledge. all but one, describes why scientific knowledge is durable.
a) science is durable because it accepts some uncertainty as part of nature.
b) science is durable because it rejects the idea of attaining absolute truths.
c) science prefers the modification of ideas, rather than their outright rejection.
d) science accepts that an understanding of the natural world can only be based on absolute truths.

1. dermis

2. chemical

3. urine

4. viruses

5. antibodies

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.