Tnpsc and Upsc Notes Pdf
Main Concepts of Life Science Life science definition The life sciences or biological sciences comprise the branches of science that involve the scientific study of life and organisms – such as microorganisms, plants, and animals including human beings. Concepts of life science Life science is one of the two major branches of natural science, the … Read more
Matthias Schleiden was a German botanist who made significant contributions to the development of the cell theory. In 1838, he published a book called “Contributions to the Phytogenesis” in which he proposed that all plants are made up of cells or derivatives of cells. He also stated that the cell is the basic unit of … Read more
Animals are classified mainly into three groups namely – Oviparous, Viviparous and Ovoviviparous depends on the site of development of embryo and whether they lay eggs (unfertilized or fertilized) or give birth to young ones. Oviparous In Oviparous Ovum-egg-, Parere- to produce) animals (egg laying animals), the young hatch from eggslaid outside the mother’s body. … Read more
This post is about Human reproduction system both, the male and female reproduction system for Tnpsc exams
This notes is for Tnpsc exams covering Embryo development, fertilization, to the formation of human babies.
This is notes for Tnpsc exams for blood and blood circulatory system, parts of heart, vein and capillary
Early classification of organisms were based on only two criteria, beneficial or harmful animals. An ancient classification system recognized 5 animal groups – domestic, wild, creeping, flying andsea animals. Initially the classification was based on organism’s fundamental characteristics such as the habitat and morphology only. Aristotle (384 to 322 BC), was the first to classify … Read more