Read the below given notes to learn about the process of fertilisation in higher plants with the help of diagram. Fertilisation is the process of the union of two dissimilar gametes, male and female. Pollen grains are carried to the stigma by pollination. It is a necessary preliminary to the more important process, fertilisation. The pollen grains rest on the [...]
The following points highlight the three main types of modifications of stems. The types are: 1. Sub Aerial Modifications 2. Underground Modifications 3. Aerial Modifications or Metamorphosed Stems. Type # 1. Sub Aerial Modifications: Slender branches develop from the axils of the leaves of some plants which usually run horizontally on the surface of the soil. Most of them are [...]
In this article we will discuss about:- 1. Definition of the Bud 2. Types of the Buds 3. Protection 4. Modification. Definition of the Bud: The bud is a condensed rudimentary shoot. It is a compact body having an axis with a delicate growing point, nodes and very short unexpanded internodes and closely crowded young leaves (Fig. 47). The plumule [...]