MCQ
Thorn is a modified branch because
- AIt is hard, straight and pointed
- BIt is a part of the plant
- ✓It arises in the axil of a leaf
- DIt is a defensive organ
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| Column $- I$ | Column $- II$ |
| $(1)$ Marginal | $(p)$ Argemone |
| $(2)$ Axile | $(q)$ Dianthus |
| $(3)$ Parietal | $(r)$ Pea |
| $(4)$ Free central | $(s)$ Lemon |
$(i)$ Cilium / Flagellum contains an outer ring of nine doublet microtubules surrounding two singlet microtubules.
$(ii)$ Cilia are smaller which work like oars, causing the movement of either the cells or surrounding fluid.
$(iii)$ Flagella are comparatively longer and responsible for cell movement.
$(iv)$ Cilium and flagellum are covered with plasma membrane. Which of the above statements are correct?
Select the correct combination for $A, B$ and $C$