Life on earth appeared 500 million years after its formation. Different theories were given by different thinkers and scientists. (i) Theory of Special Creation: It states that God created life by his divine act off creation, i.e., the earth; light; plants and animals are all being created by the supernatural power. This theory has following connotations: (a) All living organisms [...]
In this article we will discuss about the evolution of plants and animals. Evolution of Plants: The first organism that existed on land were plants that occur before animals or other life forms: (i) Bryophytes were the first plant to colonies lands and were evolved before the vascular plants like pteridophytes and gymnosperms. (ii) Vascular plants first originated in Silurian [...]
The following points highlight the four main factors that influence the life of an organism. The factors are: 1. Temperature 2. Water 3. Light 4. Soil. Factor # 1. Temperature: It is the most ecologically significant environ mental factor. It varies seasonally. Thus, decreases progressively from the equator towards the poles and from plains to the mountain tops. It ranges [...]