In this article we will discuss about the aquatic and terrestrial habitats of animals. Aquatic Habitats: The animals which live in water are called aquatic animals. According to the nature of the water aquatic animals may be marine or fresh-water. 1. Marine Animals: About three fourths of the earth's surface is covered by the oceans. The salt water serves as [...]
The below mentioned article provides an overview on the Evolution in Plants and Animals. The term evolution means unrolling or unfolding (Latin word 'evolve' = unfolding). It is defined as the process of gradual and orderly change from one condition to another. Such gradual and orderly changes are taking place in all the living, as well as non-living things. The [...]
In this article we will discuss about the aneuploidy in animals. Aneuploidy of sex chromosomes and autosomes have been reported in several animals. Nondisjunction is major source of aneuploid gametes Sturtevant reported that trisomic for chromosome 4 (triplo-IV) in Drosophila melanogaster ABCDEFGH was fertile in the female sex. In mouse, trisomics were found to be sterile or semi-sterile, but their [...]