How do scientists explain the total number of species on earth?

How do ecologists estimate the total number of species present in the world?

Assertion: A community with more species is more stable than that with less species. Reason: More the number of species, lesser the variation in the total biomass production year after year.

If there are 50 mangoes in a box,how will you write the total number of mangoes in terms of the number of boxes ?(Use b for the number of bxes.)

How do modern day scientists classify matter ?

How do you explain the functionality of a monomer ?

What is the tortal number of species discovered and described present on earth? What is the predicted number.

A species area curve is drawn by plotting the number of species against the area. How is it that when a very large area is considered the slope is steeper than that for smaller areas?

Which energy do we get on earth?