Take the 1.5 million described species. NCERT says three things…
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Take the million described species. NCERT says three things. More than per cent are animals. No more than per cent are plants, with algae and fungi. More than per cent of the animals are insects.
- How many species of animals are there at least?
- How many species of insects are there at least?
- How many species of plants, algae and fungi are there at most?
Need a reminder? The key ideaShow
About 1.5 million species are described. Estimates of the total run from 7 million to 50 million. Animals are more than 70 per cent of the described species, plants are no more than 22 per cent, and insects are more than 70 per cent of the animals. The diversity is highest in the tropics and falls towards the poles.
The worked solution
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Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Given. species.
Step 1. (a) species of animals, at least.
Step 2. (b) species of insects, at least.
Step 3. (c) species of plants, algae and fungi, at most.
Answer: ; ; species.
Watch out. The insects are a share of the animals, so the second percentage is taken of .
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