MCQ
Pollen grain is liberated at:
- AOne celled stage.
- BTwo celled stage.
- CThree celled stage.
- DTwo or three celled stage.
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$(I)$ Vertebrate hearts.
$(II)$ Vertebrate brains
$(III)$ Thorn and tendrils of Bougainvillea andcucurbita respectively
$(IV)$ Vertebrate limbs.
The correct combination is
| Bioactive substance | Role |
| (i) Statin | (A) Removal of oil stains |
| (ii) Cyclosporin A | (B) Removal of clots from blood vessels |
| (iii) Streptokinase | (C) Lowering of blood cholesterol |
| (iv) Lipase | (D) Immune-suppressive agent |