Account for the following briefly:
(iv) Herbaceous plants growing in well-watered soils are found to wilt on a hot day.
On a hot day, herbaceous plants wilt even in well-watered soil because their rate of transpiration exceeds the rate of water absorption by the roots. Due to less water in the cells, they become flaccid and leaves become soft and wilt.
Mention the difference between mitosis and meiosis with reference to
1. Number of daughter cells formed at the end of the division.
2. The chromosome number of the daughter cells formed.
Draw a diagram of the nucleus of a cell, having chromosome number 6, as it would appear in the metaphase stage of mitosis and label the following parts in the diagram:
1. Aster
2. Achromatic spindle
3. Chromatid
4. Centromere