What is the estimated number of known and described species on Earth?

What is the estimated number of known and described species on Earth?
  1. 1.7-1.8 million
  2. 2 million
  3. 1.7 billion
  4. 500,000

Solution

The number of known and described species on Earth ranges between 1.7-1.8 million.

Asked in: NCERT

Practice more The Living World questions on Aicharya