The theory of evolution by the natural selection was first formulated in Darwin’s book, in 1959, that was “on the origin of the species”. He defined evolution as the process by which the organisms are changed over time, due to the changes in their heritable, behavioral and physical traits. The changes which help the … Read more
Contraception is known as the birth control method that is designed to prevent or reduce the chances of pregnancy. It refers to any medication, activity, or use of equipment for preventing pregnancy. Many different types of contraception methods are available. The decision that which method is best should be made by consulting the health … Read more
Research has made it clear that over 50 million species of plants, animals, and micro-organisms are existing around the universe. From this over 50 million species. It only 1.4 million species have been discovered so far. Every one of these species has a specific environment in which they adapted to, from the depth of … Read more
At any given period we find ourselves amidst nature, which includes a wide variety of things such as rivers, mountains, plants, and animals. All these living and non-living organisms have a way of collaboration between them for their survival. Therefore in an ecosystem, living organisms interact among themselves and with the physical environment. There are … Read more
Among the organisms of the species, the word competition can be described in the context of struggle, between the two or more organisms, belonging to the same or the different species. Mainly, this competition is for the available resources, on which they have to depend on their survival. A limited supply of one or … Read more
Common cold also known simply as cold is an upper infectious disease caused by many different viruses. Common cold is a disease that can be managed at homes. Causes of common cold More than 200 different types of viruses causes common cold with Rhinovirus causing 30% to 40% of all adult colds. Rhinovirus causes … Read more
Looking at sex-linked inheritance as traits whose genes are located on sex-chromosome or X chromosome. View from human beings angle, sex is determined by a pair of chromosomes refers to as sex chromosomes, having that XY mechanism. The male is heterogametic XY and the woman is homogametic that’s XX. Though, the genes present on … Read more
Co-dominance can be seen as a relationship between two versions of a gene. Individuals receive a version of a gene, which referred to as an allele, from each parent. When these alleles are different, the dominant allele usually will be expressed, while the impact of the other allele, called recessive, is masked. In co-dominance, … Read more
A gene is the fundamental physical and functional element of heredity. Genes are composed of DNA. They contain specific instructions for protein synthesis. Genes are located in chromosomes. The body cells have a constant number of paired chromosomes. The two chromosomes of a pair are known ashomologous chromosomes. In human body cells, there are … Read more
Many years before chromosomes were visualized under a microscope, Gregor Mendel, known as father of modern genetics, started studying heredity in 1843. Accompanied by the advancement of microscopic techniques in course of the late 1800s, cell biologists could blotch and conjure up subcellular structures with dyes and perceive their actions in course of cell … Read more