networks

. The membrane encloses a clear fluid matrix called nucleoplasm or karyolymph. It encloses a fine network of thread-like structures, called chromatin network. It is composed of chromatin that contain DNA and histones arranged in a specific manner. The chromatin condenses to form..

The filtrate draining into the renal tubule contains several substances that are required by the body, such as glucose, amino acids, certain salts (especially sodium and potassium) and water. These substances need to be reabsorbed into the blood so that the normal constituents in the right concent..

Chromosomes (chroma = colour, soma = body) are tiny thread-like structures found in the nucleus of a cell. In a non-dividing cell they appear as a chromatin network while during cell division they become condensed to form short and thick chromosomes. Chromosomes are unique cell structures..

Here the movement of water molecules is from cell to cell through the plasmodesmata. The plasmodesmata forms a network of cytoplasm of all cells. The Casparian strip separates the cortex and the endodermis. It is composed of a wax like substance called suberin, which blocks water and solu..

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, they are characterized b..

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..

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..

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, they are ..

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 ..

This consists of respiratory wastes, nitrogenous wastes and bile pigments. Nitrogenous wastes consists of ammonia, urea, uric acid and amino acids. Excretion and osmoregulation takes place in the amoeba through the contractile vacuole. Excretion and osmoregulation takes place in the earthw..