Last seen: May 7, 2021
(ii) proper diet is needed for the rapid growth taking place in their body.
The hormones which help and control the formation of secondary sexual characters are called sex hormones. They are named so because they control the s...
Endocrine glands - Hormones 1. Pituitary gland - (i) Growth hormones 2. Ovaries - (ii) Estrogen 3. Testes - (iii) Testosterone 4. Thyroid - (i...
The changes take place differently in the body of boys and girls at puberty. These change may be listed as below: There is sudden increase in t...
In females, the ova or eggs begin to mature with the onset of puberty (10 to 12 years of age) one egg get matured and is released by one of the ovarie...
The period of life, when the body undergoes changes, leading to reproductive maturity, is called adolescence. The period of adolescence is normally 11...
(b) females
(a) tadpole
(b) asexual reproduction
(d) Plasmodium
1. The organism is hydra. 2. Asexual reproduction i.e., budding. 3. A and B – bud.C – young hydra. 4. A small out growth called bud arises on th...
Amoeba is a unicellular organism, the nucleus of the amoeba gradually divides into two nuclei. Then the cytoplasm also divides and each part gets one ...
In cloning, egg from sheep ‘A’ with taken and its nucleus was replaced with a nucleus from body cell of sheep ‘B’. The cell thus produced was implante...
(i) The fertilisation which takes place outside the body of mother is known as in vitro fertilisation. (ii) The freshly released egg from the mother...