(a) Define parturition. Name the hormones involved in induction of parturition (b) In our society, women are often blamed for giving birth to daughters. Can you explain why this is not correct?

What is parturition? Name the hormone involved in induction of parturition.

A large number married couples in the world over are childless. It is shocking to know that in India the female partner is often blamed for the couple being childless. (a)Why in your opinion the female partner is often blamed for such situations in India? Mention any two values that you as biology student can promote to check this social evil. (b) State any two reasons responsible for the cause of infertility. (c) Suggest a technique that can help the couple to have a child where the problem is with the male partner.

A metal which exists as a liquid at room temperature is obtained by heating its sulphide ore in the presence or air. (a) Name the metal and wriite its chemical symbol. (b). Write the name and formula of the sulphide ore. (c) give the equations fo chemcial reactions involved int he production fo metal from its sulphide ore. (d) Name a common device in which this metal is used. (e) Can this metal displace copper from copper sulphate solution? Why?

(a) An organic compound X of molecular formula C_(2)H_(4)O_(2) gives brisk effervescence with sodium hydrogencartbonate. Give the name and formula of X. (b) A mixture of ethyne (acetylene) and oxygen is burnt for welding . Can you tell why a mixtrue of ethyne and air is not used (c ) Name a chemical rection which is characteristic of unsatureated hydrocarbons (like alkneses and alkynes).

Given below are the steps involved in parturition. Arrange them in proper sequence and select the correct option. I. The induction of mild uterine contractions is called foetal ejection reflex. II. Stronger uterine contractions causing the further release of oxytocin. III. Origination of signals from the fully developed foetus and placenta. IV. Release of oxytocin from maternal pituitary V. Expulsion of baby from the birth canal