Advertisements
Advertisements
प्रश्न
Give scientific reasons: Mature erythrocytes in humans lack nucleus and mitochondria
Advertisements
उत्तर
In case of fertilisation of the ovum by a sperm, the corpus luteum persists and continues to secrete progesterone in the body thus maintaining its high levels. The presence of progesterone prevents the maturation of another ovum, thus temporally stopping the menstrual cycle.
APPEARS IN
संबंधित प्रश्न
Explain the process of development in human beings.
Explain how the embryo gets nourishment inside the mother’s body.
What are sexually transmitted diseases?
The pituitary hormone which stimulates contraction of uterus during child birth.
Which part of the human body passes sperms from a man to a woman?
Write the names of female sex hormones.
In human males, the testes lie in the scrotum outside the body because it helps in the
(a) process of mating
(b) formation of sperms
(c) easy transfer of sperms
(d) all the above
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
A zygote is the product of the fusion of male and female gametes.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Women after the age of 45 years normally cannot produce children.
The male homologue of the female clitoris is ____________.
