diversity and adaptations of organisms

The variations at the level of the gene which form the basis of the differences between related organism as well as the diversity among organisms is called gene mutation. Gene mutation is defined as a sudden discrete change in the genetic material of gene which i..

. Speciation does not intend to convey the dieing out of one inferior species giving way to superior ones. Species adapt to the conditions available in their environment. Some older and simple species live on quite effectively. The scorpion, is one of the more primitive invertebrate which..

Variation could arise through a process of hybridisation, sometimes even in interspecific hybrids. Genetic variability is necessary for a species to increase its chances of survival. The environment is constantly undergoing changes due to geological and biological processes. Hence, it is necessary..

The colour variation arises during reproduction just by random luck. More brown genes end up in the offspring than green genes, providing diversity without any adaptations. Accidents in small populations can change the frequency of some genes. Such variations in a population oc..

i) Old and inefficient organs are replaced by young and developing organs. ii) Leaf fall in deciduous trees reduces the rate of transpirational loss. This is an adaptation to tide over winter. iii) Recovery of nutrients from senescing organs by diverting the ..

Human Digestive System - Man is omnivorous - feeding on different kinds of food. Thus, the structure of the digestive system should be adapted to this diet. The human digestive system consists of an alimentary canal, which is approximately 8metres long. The alimentary canal also carries o..

Human Digestive System - The Mouth Cavity - Man is omnivorous - feeding on different kinds of food. Thus, the structure of the digestive system should be adapted to this diet. The human digestive system consists of an alimentary canal, which is approximately 8metres long. The alimentary c..

Biology is a branch of science, which deals with the study of life. It is concerned with the study of living organisms, which are immeasurably diverse and complex than the non-living matter. Hence, biology is also described as life science or natural scienc..

Ecology concerns with the associations and interactions of the organisms and the environment in general. The living place or dwelling place of an organism is called habitat. Within a given habitat there exists variations or micro habitats. In a given habitat we can observe physi..

Phylum Protozoa (Primitive Animals)..