Account for the following briefly:
Animals owe their existence to chlorophyll.
Plants produce their own food by using light and chlorophyll. The herbivores directly eat plants. The carnivorous animals feed on the herbivores. Thus, all types of animals, including man, depend on plants directly or indirectly for food.
Account for the following briefly:
(iv) Herbaceous plants growing in well-watered soils are found to wilt on a hot day.
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
