The Amazon rainforest is home to more than $...........$ species of invertebrates.

The species,though insignificant in number,determine the existence of many other species in a given ecosystem. Such species is known as

Write an explanatory note on Biodiversity.

Tropical regions show the greatest level of species richness because:
$A$. Tropical latitudes have remained relatively undisturbed for millions of years,hence more time was available for species diversification.
$B$. Tropical environments are more seasonal.
$C$. More solar energy is available in the tropics.
$D$. Constant environments promote niche specialization.
$E$. Tropical environments are constant and predictable.
Choose the correct answer from the options given below.

Match the biodiversity found in the Amazonian rainforest of South America with their respective counts.

List-$I$	List-$II$
$(a)$ Plants	$(1)$ $1,25,000$
$(b)$ Mammals	$(2)$ $427$
$(c)$ Reptiles	$(3)$ $40,000$
$(d)$ Invertebrates	$(4)$ $378$

Which of the following statements is correct?