STD 12 - 6. evolution — NEET STD 11 Science — Question

Testis and ovary performs dual functions as a primary sex organ as well as an endocrine gland. Select incorrect statements for gonads :
(i) The testis secretes androgens mainly testosterone.
(ii) Androgens stimulate the development, maturation and functions of the male accessory sex organs and secondary sex characters of the male.
(iii) Testosterone stimulates spermatogenesis, male sexual behaviour (libido) and erythropoiesis.
(iv) The ovary secretes estrogen and progesterone.
(v) Estrogen stimulates growth and development of female accessory sex organs and secondary sex characters.
(vi) Progesterone plays a major role in the maintenance of pregnancy as well as in mammary gland development and lactation.
(vii) Testis hormones produce anabolic (synthetic) effects on protein and carbohydrate metabolism.

During the transmission of nerve impulse through a nerve fibre, the potential on the inner side of the plasma membrane has which type of electric charge?

Renin is secreted from

Emphysema is a chronic disorder which is caused due to

Skeletal muscles are controlled by

Java ape man is considered to have existed in

Rate and depth of respiration shall increase when

Which is not the function of endoskeleton?

Assertion: The Mendel's laws were extended in the form of 'Chromosomal Theory of Inheritance'.
Reason: Mendel's law of independent assortment does not hold true for the genes that were located on the same chromosomes.