Prelims 2022 · CSAT / Reading Comprehension · Question 31
According to the passage, natural selection cannot anticipate future environments on the earth as
- species not fully prepared to face the environmental changes that await them will face extinction
- all the existing species would get extinct as their genomes will not withstand biological mishaps
- inability of the genome to withstand environmental changes would result in extinction
- extinction of species is a common feature
Select the correct answer using the code given below.
Answer
1, 3 and 4
1. Correct. If species are not adapted to future environmental changes, natural selection cannot pre-equip them; such species may go extinct.
2. Incorrect. The passage idea is not that all existing species will go extinct due to genomes failing against biological mishaps; this is too absolute and not implied.
3. Correct. If genomes cannot cope with environmental change, extinction can result; natural selection works only on present variation, not future needs.
4. Correct. Extinction is a common feature in evolutionary history, which supports why natural selection cannot guarantee survival in future environments.
Hence, the correct set is 1, 3 and 4.