Coal (Formation, Types and Importance)
What is coal? Coal is a solid, black, readily combustible fossil fuel found as thick layers in deep mines under the surface of the earth. […]
Biology
Fossils (Formation, Types and Importance)
What are fossils? The term fossil comes from the Latin word fossilis, which literally means ‘dug up’. Fossils are the remnants, impressions, or traces of […]
Structure and Life cycle of a Mushroom
Mushrooms are multicellular fungi which generally grow in moist, humid and dark places, on rotten logs of wood, tree trunks, soil rich in organic matter, […]
How to identify poisonous mushrooms?
A variety of mushrooms are found naturally growing on rotten logs of wood, dead barks of trees, fallow lands, forest beds, animal excreta etc. They […]
Structure of Taste receptors and Mechanism of Gustation
The sensation of taste is called gustation or gustatory response. Various chemoreceptors present in the tongue help in getting the sense of taste. The sense […]
Structure of Olfactory receptors and Mechanism of Olfaction
Olfaction is the sense of smell. It is how we perceive odors. Nose is the organ with millions of olfactory receptors that help us perceive […]
Human teeth: Types, Dental formula, Structure, Composition and Functions
Teeth are present on both the jaws; borne by the pre-maxillae and maxillae of the upper jaw and mandibles of the lower jaw. Human teeth […]
Transpiration: Mechanism, Types, Factors affecting transpiration, Biological significance and Disadvantages
Plants absorb a large quantity of water from the soil by root hairs and only a small part (1-2%) of this water is utilized by […]
Vacuoles: Structure, Types and Functions
Vacuoles are membrane bound cell organelles found almost in all the cells. They are small in animal cells whereas fungi and plants have large vacuoles. […]
Different Gastrointestinal hormones and their Action
The epithelium present in the alimentary canal secretes hormones. These hormones are carried by blood to the digestive glands which then release their digestive secretions […]