a small reproductive cell protected by a thick cell wall

It is the outer tough covering around the cell, which provides specific shape and protection to the bacterium. It prevents the cell from swelling and bursting due to osmotic changes. It is composed of a polysaccharide called murein or peptidoglycan. It consists of poly..

The cells of many protists are surrounded by a filamentous layer of oligosaccharides. This forms the cell coat. It is in fact a part of the cell membrane. In many cases the cell coat becomes deposited with salts of calcium and silica. The cell coat ..

Cyanobacteria reproduce mostly by vegetative and asexual methods. Vegetative reproduction occurs by fission or fragmentation or by the formation of hormogonia. Unicellular forms exhibit fission while filamentous multicellular forms exhibit fragmentation. Asexual reproduction occ..

Protective 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..

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 at the peri..

Summary - Reproduction is defined as the production of individuals of the same species, that is the next generation of the species. There are basically two types of reproduction - asexual and sexual. Asexual reproduction involves only one parent and the offspring is ge..

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 occupies m..

. After fertilisation, the fertilised ovum trickles down into the uterus for implantation. Cleavage is the process which transforms the fertilised ovum into a sphere of closely aggregated cells. The fertilised ovum divides repeatedly in close succession to form blastomeres. Cleavage divis..

Summary - Reproduction is defined as the production of individuals of the same species, that is the next generation of the species. There are basically two types of reproduction - asexual and sexual. Asexual reproduction involves only one parent and the offspring is ge..

In human beings, sexual reproduction takes place. Sexes are separate and hence they are known to exhibit sexual dimporphism. Males have sex organs called the tetes while the females have sex organs called the ovaries. Even in the external appearance, males and females show differences. So..