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Slime Moulds
Slime Moulds - These are a group of peculiar organisms which share characteristics of fungi and animals. Hence, they are also called as Mycetozoa . In the modern classification they are described as protistan fungi . Most examples of slime moulds are terrestrial and occur in coo..
Cell wall
The cell wall is present only in plant cells. It is made up of a complex polysaccharide carbohydrate called cellulose. Its function is to give strength and rigidity to the cell. It is non-livin..
Cell Wall in Plant Cells
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. C..
Body Wall
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,..
Characteristic features of the meristematic cells
The cells are relatively smaller in size compared to mature cells. They are either rectangular or isodiametric in shape. The cells are always compactly arranged, without any intercellular spaces. The cells have a thin cell wall, wh..
The main differences between a typical animal cell and a typical plant cell are summarized below:
Animal cell Plant cell Usually smaller in size Usually larger in size Cell wall is absent. Cellulose in any form is absent Cell wall made up of cellulose is present Cytoplasm is denser, more granular and ..
Collenchyma
It is a type of simple permanent tissue, which is mainly meant for providing mechanical support to the shoot system of a plant. Collenchyma is completely absent in the root. It is composed of elongated cells that are compactly arranged. Sometimes, the cells may enclose small int..
Protective Tissues
These tissues are usually present in the outermost layer of the plant body such as leaves, stem and roots. It is one cell thick and covered with cutin and protects the underlying tissues present in the plant body. As roots and stems grow older with time, tissues a..
Protective Tissues
Protective Tissues - These tissues are usually present in the outermost layer of the plant body such as leaves, stem and roots. It is one cell thick and covered with cutin and protects the underlying tissues present in the plant body. As roots and stems grow older with..
Tonicity of Solutions
Cell walls in living organisms are seldom perfectly semipermeable. Usually they permit passage to some of the simpler substances and then these substances fail to register an osmotic pressure contribution on the cell walls. The reduced osmotic pressure of a s..
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