Answer: about 1.5 million.
- A about 0.5 million
- B about 1.5 million
- C about 20 million
- D about 100 million
Correct answer: B. about 1.5 million
Explanation: Slightly more than 1.5 million species have been recorded and described so far, though the actual number on Earth is estimated to be far higher.
Concept context
Levels of biodiversity, species richness patterns, threats (HIPPO), and conservation strategies. Always in NEET.