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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..

The circle graph represents the percentage of private schools in the United States which collect annual tuition fee. Find the fraction of the schools with an annual tuition fee of $1501 to $2500. => 3 15 or 13 20 or 1 20 or 3 20..

The circle graph represents the percentage of private schools in the United States, which collect annual tuition fee. Find the fraction of the schools with an annual tuition fee of $1501 to $2500. => 3 20 or 13 20 or 1 20 or 9 20..

The nephron or uriniferous tubule is the functional unit of the kidney. A nephron consists of a twisted tubule closed at one end, open at the other with a network of associated blood vessels. Each kidney of man is formed of about one million nephron..

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..

Introduction - Polymers are macro-sized molecules of relatively high molecular mass, which find extensive use in our daily life. Polymers are large but single chain-like molecules in which the repeating unit derived from small molecules called monomers are covalently linked. Structurally,..

Plasma Membrane - The plasma membrane or cell membrane surrounds the cell contents in all types of cells. It is a multipurpose covering composed of phospholipids and proteins. fig. 16.4 - Cell Membrane Apart from the plasma membrane, an eukaryotic cell also shows intracellular and subcellular membr..

. Today, petroleum based automobiles have largely diversified into: public transport vehicles - lorries, buses, trains, trams private transport vehicles - cars, vans, scooters, mopeds, motorcycles The gravity of problem of pollution due to transport vehicles is not the type of vehicles al..

Silicates - Silicate is the general term given to solids with silicon-oxygen bonds. A large percentage of the earth's crust consists of silicate minerals. Some of the important silicate minerals are quartz, asbestos (calcium magnesium silicate, CaMgSi 2 O 6 ), feldspar (potassium aluminium silicate..

Every cell, whether it is prokaryotic or eukaryotic, is enclosed in a thin covering called cell membrane . It is also called as plasma membrane or plasma lemma . The cell membrane can only be seen through the electron microscope since its thickness is well below the resolving power of human eye. fi..