science channel networks

These are very fine thread-like, coiled filaments uniformly distributed in the nucleoplasm. At the time of cell division, the chromatin becomes thick and ribbon like and are known as chromosomes. The chromosomes contain genes, which are composed of DNA (deoxy-ribonucleic acid). Genes are responsib..

Within the nuclear membrane, completely filling up the space, is a clear, semi-solid, granular substance or matrix called the nucleoplasm. The nucleolus and the chromatin network lie suspended in the nucleoplas..

At each pole, the gathering chromosomes become less distinct as they merge into a network The nucleolus reappears at each pole. A newly formed nuclear membrane encloses the chromatin network. Thus two daughter nuclei are formed. The number of chromosomes in each daughter nucleus..

Also called cell drinking. There are pinocytosis channels at certain points through which the cell ingests the food. ..

This is a complex network of tubes, the lumen of which is filled with fluid. Two types of endoplasmic reticula are seen. They are: Tubes with a smooth surface are called smooth endoplasmic reticula. They secrete lipids. Tubes with spherical bodies (ribosomes) attached are known as r..

The male reproductive system comprises of the following: a pair of testes , organs that produce the male gametes i.e., sperms a network of tubules and tubes for passage of the sperms called the duct system associated glands a mating organ called the penis ..

The chromatin network condenses into chromosomes, which are long and slender threads. Each thread is a single chromatid, and not double as in Mitosis Two homologous chromosomes come together and lie side by side. Pairing takes place along their entire length The two homologous chr..

Food Webs - In nature, the food and feeding relationships of plants and animals are rarely as simple as the examples of food chains described above, because many animals eat more than one kind of food. On this account, different kinds of food chains overlap each other or intercross each other. The ..

The male reproductive system comprises of a pair of testes that are present in a thin-walled sac called the scrotum . The scrotum is contained within the abdominal cavity in the embryonic stage. Shortly before birth, they come down and remain outside throughout life. This is because the testes ..

Water is a unique and remarkable compound, essential to all forms of life. Human beings and the flora and fauna cannot survive without water on this planet. A large amount of life on this planet is aquatic based i.e., can only survive in water. It is the most abundant substance after air in the ea..