NCERT gives the species that went extinct in the last 500 years: 338 vertebrates, 359 invertebrates…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
NCERT gives the species that went extinct in the last years: vertebrates, invertebrates and plants.
- How many species went extinct in all?
- What per cent of them are vertebrates? Give one decimal.
- What per cent are invertebrates, and what per cent are plants? Give one decimal each.
Need a reminder? The key ideaShow
Five mass extinctions have happened, and a sixth is in progress at a rate 100 to 1000 times faster than before humans. In the last 500 years, 784 species have gone extinct: 338 vertebrates, 359 invertebrates and 87 plants. If a share of the species is left after years, the share kept each year is (not in the NEET syllabus).
The worked solution
Have you tried it?
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. , and species.
Step 1. (a) species.
Step 2. (b) per cent.
Step 3. (c) per cent, and per cent.
Answer: species; ; and per cent.
Check. per cent.
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