primary wall and secondary wall

A cell wall surrounds the plasma membrane in all plant cells. It is a porous covering of about 0.1 milli microns to 10 milli microns in size. The cell wall is chiefly composed of insoluble polysaccharides. The most common constituent is cellulose. Certain other polysaccharides l..

Wall pressure is the pressure which is exerted by the rigid and elastic cell wall and is equal and opposite to turgor pressu..

From the oesphagus to rectum, the gut wall is mainly composed of two region..

From the oesphagus to rectum, the gut wall is mainly composed of two region..

A cell wall is a characteristic feature of plant cells, bacteria and fungi. The composition however varies in different group..

The body wall is dermo muscular. It consists of a thin cuticle, and epidermis and musculature. The cuticle is an elastic non-cellular covering. Epidermis is represented by a layer of columnar epithelial cells, represented by supporting cells, glandular cells, and albumen cells. In additio..

green and..

The immune response due to first encounter with an antigen takes a longer time, feeble and declines rapidly. After the initial contact with an antigen, there is a period of several days during which no antibody is present, then there is a slow rise in the antibodies, followed by a gradual decline. ..

'The amount of organic matter or biomass produced by an individual organism, population, community or ecosystem during a given period of time is called productivity..

The cellwall of prokaryotes like bacteria is composed of peptidoglycans. Apart from maintaining the shape and size of plant cells, the cell wall is involved in some specific functions such as Protection against the attack of pathogens Providing mechanical support Allowing movement of mate..