MCQ
Fossils are dated now by
- AStratigraphic position
- BAmount of calcium residue
- CAssociation with other animals
- ✓Radioactive carbon $({C^{14}})$ contents
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$I$. There are many side effects of tubectomy and vasectomy
$II$. Purpose of tubectomy is to prevent egg formation
$III$. The most important component of the oral contraceptive pill is progesterone
$IV$. Contraceptive oral pills help in birth control by preventing ovulation
| Column $ -I$ | Column $ -I$ |
| $A.$ Escherichia coli | $I.$ Nif gene |
| $B.$ Rhizobium melilotae | $II.$ Digestive hydrocarbon of crude oil |
| $C.$Bacillus thuringiensis | $III.$ Production of human insulin |
| $D.$Pseudomonas putida | $IV.$Biological control of fungal disease |
| $V.$ Biodecomposed insectiside |