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

  • A
    By counting every individual organism in the world.
  • B
    By using statistical comparisons of species richness between well-studied groups in temperate and tropical regions.
  • C
    By assuming that the number of species is constant across all geographical regions.
  • D
    By relying solely on fossil records from the past.

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Similar Questions

Given below are some major species of organisms found in the Amazon rain forest.
$a$. Plants $b$. Mammals $c$. Birds
Considering their numbers present,choose the correct option showing the relationship among these organisms.

How many percent of biodiversity is present in India out of the total global species diversity (in $\%$)?

How many genetically diverse varieties of rice are there in India?

According to the world population, India is placed at which position?

Match the following columns regarding the number of species on Earth:
Column-$I$Column-$II$
$(P)$ Ants$(I)$ $28,000$
$(Q)$ Beetles$(II)$ $3,00,000$
$(R)$ Fish$(III)$ $20,000$

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