specialization

It is a special type of a covalent bond wherein the shared pair of electrons is supplied by only one of the bonding atoms. A lone pair of electrons is present in one of the ato..

What does your subject look like? What size, colours and texture does it have? Any special features worth notin..

This is the simplest form of wheatstone bridge and is specially useful for comparing resistances more accuratel..

Modifications of Leaves - A normal leaf is thin, flat and green and performs the function of photosynthesis. In some plants certain special functions are performed by leaves, which become modifi..

Coordinate Bond - It is a special type of a covalent bond wherein the shared pair of electrons is supplied by only one of the bonding atoms. A lone pair of electrons is present in one of the ato..

These tissues are derived from meristematic tissues. They have lost the power of dividing, having attained their definite form and size. In their earlier stages the cells are more or less similar in structure but slowly they become specialized and form permanent tissues. They can be class..

The leucocytes are phagocytic and engulf the bacteria and other micro-organisms that attack the body cells. The lymphocytes secrete antibodies, that are special protein molecules that act against specific proteins present on the surface of the germs. These proteins are called the antigens..

Generally, the stems are aerial and grow above the soil surface. Sometimes, the stem becomes variously modified to perform special functions like perennation, vegetative propagation and food storage. The modified stems may be grouped under three heads viz, underground, subaerial and aeria..

It is a complex permanent tissue, which is specialized for the conduction of water and mineral substances in the plant body. Xylem is a heterogenous tissue made up of four different types of cellular element..

It is the development of an unfertilised ovum into a fully developed haploid organism. It is a special type of monoparental reproduction found in a number of invertebrates like aphids, rotifers and honeybees, and a few vertebrates like domestic turkey among birds and among the lizards, sp..