The following points highlight the two main types of seed. The types are: 1. Dicotyledonous Seeds 2. Monocotyledonous Seeds. Type # 1. Dicotyledonous Seeds: i. Gram Seed: The gram seed is more or less rounded at one end and pointed at the other. It is covered by a brown seed coat called testa; the inner whitish coat is the tegmen. [...]
The following points highlight the three main parts of a leaf. The parts are: 1. The Leaf-Base 2. The Petiole 3. The Lamina. Part # 1. The Leaf-Base: It is by no means a conspicuous part of the leaf. Some leaves like those of the pea, sensitive plant, mango have swollen leaf-bases. Such a leaf- base is called pulvinus (Fig. [...]
According to the nature of the stem the plants are often classified into groups:- 1. Herbs 2. Shrubs 3. Trees 4. Trailers 5. Climbers. Group # 1. Herbs: These are the small plants with soft stems having scanty woody tissues. On the basis of duration of life, herbs may be annuals, biennials and perennials. If they grow for only one season [...]