Taxonomy and systematics · NCERT Biology

The diversity of organisms on Earth is approximately:

  1. 1.7–1.8 billion
  2. 1.7–1.8 million
  3. 5–10 million
  4. 10–15 million
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Correct answer: 1.7–1.8 million

According to known data, approximately 1.7 to 1.8 million species have been described and named so far, representing the documented biodiversity.

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