In this article we will discuss about historical evolution of the plants that can be traced through the geological periods. (1) Evolution of organisms on the earth's surface begins from the pre-cambrian period when probably the first life in the form of single celled or unicellular microscopic organisms resembling the present-day cocoid or spheroid bacteria, was evolved in aquatic environment. [...]
There is a wide range of variations in the distribution of vegetation on the globe. There is a zonal pattern of vegetation from equator towards the poles and from seal level to vegetation level on the high mountains. The distribution of plants is affected and controlled by a variety of factors e.g.: (i) Climatic factors (sunlight, temperature, moisture and humidity, [...]
In this article we will discuss about:- 1. Meaning of Plant Community 2. Characteristics Plant Community 3. Vertical Stratification 4. Development. Meaning of Plant Community: Plants play very dominant role in the biosphere because these are primary producers in the biosphere and provide directly or indirectly food to all terrestrial and aquatic animals including man. The social groupings of plant [...]