Notes and Study material for Exams
The Chromosomes present in the diploid cells of the majority of the sexually reproducing animals are of two types: autosomes bearing genes for somatic characters and sex chromosomes bearing genes for sex. Sex chromosomes also carry some genes for non-sexual characters such as colour blindness and haemophilia. Such genes which are always associated with … Read more
Whether an animal will become a male, a female, or a hermaphrodite is determined very early in development. Scientists have worked for hundreds of years to understand the sex-determination system. The first major breakthrough in understanding sex determination was the discovery of sex Chromosomes in the early 1900s. From meticulous analyses of male and … Read more
There is vast diversity of living organisms. The chemical compositon and metabolic reactions of the organisms appear to be similar. The composition of living Tissues and non-living matter also appear to be similar in qualitative analysis.Closer analysis reveals that the relative abundance of carbon, hydrogen and Oxygen is higher in living system. All forms … Read more
Objects having characteristics of cellular organization, Growth, Reproduction, ability to sense Environment and give response are living organisms. There are some important features of living organisms: It should grow, which means its structure changes as time goes by in an advantageous manner. It should show adaptation to the environment. It should maintain some balanced … Read more
Endocrine Glands: harmone and their function The endocrine system is made up of glands that produce and secrete HORMONES, chemical substances produced in the body that regulate the activity of cells or organs. These hormones regulate the body’s Growth, Metabolism (the physical and chemical processes of the body), and sexual development and function. The hormones … Read more
Usefulness Of Animals And Human Affairs As food The human Population exploits a large number of animal species for food, both of domesticated Livestock species in Animal Husbandry and, mainly at sea, by hunting wild species. Marine fish of many species, such as herring, cod, tuna, mackerel and anchovy, are caught commercially, forming an important … Read more