In _ phase of human development the individual attains high growth rate, increase secretion of sex-hormone occures, secondary sex characters get expressed in both sex,

Name two hormones which cause secondary sex charcters in male and female human beings.

Which hormone is reponsible for the development and maintenance of the male sex characters?

[A] : [A]: Spermatogenesis occurs in the seminiferous tubules of the testes which also produce testosterone in interstitial cells. [R]: Testosterone maintains the secondary sex characteristics of males, such as low voice, facial hair and increased muscle strength.

[A] : Spermatogenesis occurs in the seminiferous tubules of the testes which also produce testosterone in interstitial cells. [R]: Testosterone maintains the secondary sex characteristics of males, such as low voice, facial hair and increased muscle strength.

Name the hormone which produces changes in secondary sex organs in human female to prepare for anticipated pregnancy.

A country with a high rate of population growth took measures to reduce it. The figure below shows age-sex pyramids of populations A and B twenty years apart. Select the correct interpretation about them

Assertion : Age sex structure of human population in countries like France and Germany gives a steep pytamid. Reason : In countries like Sudan and India, the population is increasing at a rapid rate.

Go through the following statement:- (i) In both pre-pubertal and post-meno-pausal females, there are low levels of female sex hormones and high levels of gonadotropins. (ii) There is no bleeding in an oestrous cycle as the broken endometrium is absorbed. (iii) Oestrogen is mainly secreted by the granulosa cells and progesterone mainly by the theca cells (iv) Some of the menopausal symptoms can be reversed HRT whereas a small dose of gonadotrophins is given to the patient. Which of these are correct?