BIOLOGY

Tolerance is the ability of living organisms to withstand or tolerate little unfavourable changes in the environment which affect their survival. Living organisms can only live in a particular habitat ...

Decomposers Decomposers are fungi or bacteria which live saprophytically or feed on dead remains of plants, animals and organisms leading to or resulting in recycling of nutrients by breaking down ...

Pyramid of number refers to the number of individual organisms at each trophic level which decreases progressively from the first to the last trophic level in a food chain. Pyramid ...

Tadpole The young toad called tadpole uses gills for gaseous exchange. At the tadpole stage, the animal develops external gills through which direct diffusion of gases takes place between the ...

Metamophosis is defined as the series of gradual changes of form and shape of an insect from the fertilised egg (immature stage) to adult (mature stage of adulthood). Certain organisms ...

The cockroach exhibits incomplete metamorphosis. This starts from fertilised eggs to nymph and finally to adult or imago stage i.e. Egg -> Nymph -> Adult. Mating begins when the male ...

The vertebral column, also known as the backbone or spinal column, is the central supporting structure of the skeleton. The vertebral column forms the backbone of vertebrate animals and protects ...

Energy exists in various forms. These forms of energy are inter-convertible, i.e ., one form of energy can be transformed into another form. Such energy transformation are governed by the ...

In sexual reproduction, the male animal produces the sperm while the female produces the egg or ovum. The fusion of the sperm and the egg in the fallopian tube of ...

All living things are capable of responding to internal and external stimuli. The ability to do this is called irritability or sensitivity. By this means, plants and animals are able ...