DENDROLOGY

Detailed explanation-1: -Solution : In sexually reproducing organisms, the male gamete is called the antherozoid or sperm and the female gamete is know as the egg or ovum. They are not used for vegetative propagation.

Detailed explanation-2: -Some plants like papaya, marigold, chilli, capsicum, tomato, etc., cannot be propagated by asexual method. It is the only means of creating genetic diversity of plants. New varieties and cultivars of ornamental and vegetable crops can be developed only by this method.

Detailed explanation-3: -Not every plant grows from a seed. Some plants, like ferns and mosses, grow from spores. Other plants use asexual vegetative reproduction and grow new plants from rhizomes or tubers. We can also use techniques like grafting or take cuttings to make new plants.