MCQ
In fluid mosaic model of plasma membrane.
- AUpper layer is non-polar and hydrophilic.
- BUpper layer is polar and hydrophobic.
- ✓Phospholipids form a bimolecular layer in middle part.
- DProteins form a middle layer.
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$(i)$ Excretion is performed by malphigian tubules.
$(ii)$ They absorb nitrogenous waste products and convert them into uric acid which is excreted out through hindgut.
$(iii)$ In addition, fat body, nephrocytes and urecose glands also help in excretion.
| Column $I$ | Column $II$ |
| $a.$ Auxin | $(i)$ Root hair formation |
| $b.$ Cytokinin | $(ii)$ Seed development |
| $c.$ Ethylene | $(iii)$ Xylem differentiation |
| $d.$ $ABA$ | $(iv)$ Nutrient mobilisation |