MCQ
Antivenom injection contains preformed antibodies while polio drops that are administered into the body contain
- Agamma globulin
- ✓attenuated pathogens
- Cactivated pathogens
- Dharvested antibodies.
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Aves, terrestrial snail, marine fishes, Many bony fishes, Mammals
Reason : Sex in humans is a polygenic trait depending upon a cumulative effect of some genes on $X-$ chromosome and some on $Y-$ chromosome.
|
Column- $I$ |
Column- $II$ |
|
$A.$ $500$ million years ago |
$1.$ Sea weeds and few plants |
|
$B.$ $350$ million years ago |
$2.$ Jawless fishes |
|
$C.$ $320$ million years ago. |
$3.$ Inverbebrates |