Question
Laminarin and manitol of class-Phaeophyceae (brown algae) are
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$(a)$ Complete disintegration of the nuclear envelope marks the start of the second phase of mitosis.
$(b)$ Metaphase chromosome is made up of one sister chromatid.
| 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 |