Imagine two small, isolated tropical islands located far from the mainland that are similar in size and physical characteristics. although the islands have been habitable for millions of years, a small population of frogs occupies only one of the islands, having appeared there 30 years previously. what are two possible reasons why the frogs colonized the one island, and only relatively recently? what factor does not appear to have prevented them from colonizing the other island?

hope it mark me as brainlieast.

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.

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.

yes, because even though a theory has a  lot of evidence to support it, it is not always true