MCQ
The primary function of stem is $..........$
- ✓To bear and expose leaves to sunlight.
- BTo anchor the plant in soil.
- CTo absorb water and mineral salts from the soil.
- DTo help in vegetative propagation
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$(i)$ Arteries are thickwalled and have narrow lumen as compared to veins.
$(ii)$ Angina is acute chest pain when the blood circulation to the brain is reduced.
$(iii)$ Persons with blood group AB can donate blood to any person with any blood group under $ABO$ system.
$(iv)$ Calcium ions play a very important role in blood clotting.Which two of the above statements are correct?
$(i)$ It is a membrane bound space found in the cytoplasm.
$(ii)$ It is bound by a single membrane called tonoplast.
$(iii)$ It contains water, sap, excretory products and other materials not useful to the cell.
$(iv)$ It has higher concentration of sap than the cytoplasm.
| List $I$ | List $I$ |
| $A$ Exophthalmic goiter | $I$ Excess secretion of cortisol, moon face hypergylcemia. |
| $B$ Acromegaly | $II$ Hypo-secretion of thyroid hormone and stunted growth. |
| $C$ Cushing's syndrome | $III$ Hyper secretion of thyroid hormone protruding eye balls. |
| $D$ Cretinism | $IV$ Excessive secretion of growth hormone. |