MCQ
Which of the following would necessarily decrease the density of a population in a given habitat ?
- ANatality > mortality
- BImmigration > Emigration
- ✓Mortality and emigration
- DNatality and immigration
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| List-l | List-II |
| (A) Gene 'a' | (I) $\beta-$galactosidase |
| (B) Gene 'y' | (II) Transacetylase |
| (C) Lactose | (III) $\beta-$galactosides |
| (D) Gene 'z' | (IV) Repressor protein |
| Column I (Features of developing embryo) | Column II (Time of Formation) |
| (A) Heart | (i) End of 24 weeks |
| (B) Formation of eyelashes | (ii) Fifth month |
| (C) First movement | (iii) End of 12 weeks |
| (D) Formation of major organs | (iv) After 1 month of pregnancy |