Amazon rain forest has the greatest biodiversity on earth. List any two hypothese that are proposed by the biologists to account for the greater biological diversity .

Explanation

The hypothese are :
(a) Speciation is generally regions , which are subjected to frequent glaciations in the past , tropical latitudes have remained undisturbed for millions of years and hence had a long time for species diversification .
(b) Tropical environments are less seasonal , relatively more constant and predictable , such constant environments promote niche specialisation and lead to a greater species diverstiy .
(c) There is more solar energy available in the tropics , which contributes to higher productivity , this in turn might contribute indirectly to species diversity .