Evolution of Organisms: Genetic Variation, Frequency of Genes in a Population and Acquired and Inherited Traits! Evolution refers to the process by which early organisms of the earth diversified into various new forms through slow but continuous variations. Ever since the appearance of the first living beings on the earth some 3.5 billion years ago, new forms have continuously originated. [...]
Sexual Reproduction in Living Organisms! Sexual reproduction involves the two sexes, namely, male and female. The male sexual unit is known as male gamete, while the female sexual unit is known as female gamete. The formation of gametes and their fusion constitute sexual reproduction. The male gamete is smaller and more active than the female gamete. The female gamete is [...]
Asexual Reproduction in Living Organisms! The type of reproduction that takes place without the process of gamete (sex cell) formation is called asexual reproduction. This type of reproduction takes place commonly in lower plants and animals, where the body is not very complex. There are different forms of asexual reproduction. Binary fission: Binary fission occurs under favourable environmental conditions. Binary [...]