MCQ
In a pond ecosystem, the food chain starts with:
- AZooplanktons.
- BSmall insects.
- CPhytoplanktons.
- DSmall fishes.
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| $(a)$ Homo habilis | $(i)$ $900\; \mathrm{cc}$ |
| $(b)$ Homo neanderthalensis | $(ii)$ $1350\; \mathrm{cc}$ |
| $(c)$ Homo erectus | $(iii)$ $650-800\; \mathrm{cc}$ |
| $(d)$ Homo sapiens | $(iv)$ $1400\; \mathrm{cc}$ |
Select the correct option.
$(a)\quad (b)\quad (c)\quad (d)$
$T$-cells are lymphocytes which produce the cellular immunity. These are developed from