In this article we will discuss about the Characters and Economic Importance of Pteridophytes. Characters of Pteridophytes: They are characterised by the following features: 1. Plant body is a sporophyte (2n) and differentiated into true stem, leaves and roots. 2. Leaves can be microphyllous (small without forming leaf gaps in vascular supply of stem, e.g., Selaginella) or macrophyllous (megaphyllous or [...]
In this article we will discuss about:- 1. Characteristics of Seed Plants 2. Development of Seed Habit 3. Three Generation Locked in Seed. Characteristics of Seed Plants: Some of the important characters of seed plants are listed below: 1. They comprise over 250,000 vascular plants. 2. After sexual reproduction, the plants produce seeds for dispersal and multiplication. The seeds are [...]
The following points highlight the three types of life cycle of plant groups. The types are: 1. Haplontic 2. Diplontic 3. Haplodiplontic. Type # 1. Haplontic (Fig. 3.24): There is a single vegetative individual or somatic phase. It is haploid and is often called gametophyte. The haploid plant body may be unicelluÂlar, colonial or multicellular. It can multiply vegetatively and [...]