MCQ
Gene mutation is caused by
- AReproduction
- BLinkage
- ✓Change in the sequence of nitrogenous base
- DChange in the sequence of genes in $DNA$
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Given below are four methods $(A-D)$ and theirmodes of action $(i-iv)$ in achieving contraception. Select their correct matching fromthe four options that follow
| Method | Mode of Action |
| $(A)$ The pill | $(i)$ Prevents spermsreaching cervix |
| $(B)$ Condom | $(ii)$ Prevents implantation |
| $(C)$ Vasectomy | $(iii)$ Prevents ovulation |
| $(D)$ Copper $T$ | $(iv)$ Semen contains no sperms |