reproduction growth and development

In rats, as in all vertebrates, sexes are separate. Male and female exhibit several differences in their external features. The Male reproductive system consists of a pair of testis that are enclosed in scrotal sacs, a pair of vas deferens, a seminal vesicle, ejaculatory duct and penis. T..

Reproduction and Development..

Reproduction and Development..

Reproduction and Development..

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An animal performs all its life functions with an aim to be alive till it matures and reproduces. Reproduction is the ability of living organisms to produce new individuals similar to themselves. Reproduction ensures perpetuation and survival of their species. It leads to ..

Summary - Animals may reproduce by asexual and sexual modes. The reproductive system of sexually reproducing animals consists of primary sex organs which produce the gametes, the secondary sex organs which participate in reproduction but do not form gametes and accessory sex cha..

At the cellular level, growth of multi cellular organisms is governed by two main activities Reproduction of individual cells of body by mitotic cell divisions Growth of cells by synthesizing new protoplasm. The interphase stage of the cell cycle is differentiated into..