Class 12th Biology 2016 Set1 Delhi Board Paper Solution
Question 11
Why is breast-feeding is recommended during the initial period of infant's growth? Give reasons.
Answer
The milk produced during the initial few days of lactation is called colostrum which contains antibolies important to develop resistance for the new born-babies. It provides balanced nutrition to the baby and also protect from allergies. So, breast-feeding is important for bringing up a healthy baby.
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(a) Adaptations of desert plants and animals
(b) Adaptations of plants to water scarcity
(c) Behavioural adaptations in animals
(d) Importance of light to plants
(e) Effect of temperature or water scarcity and the adaptations of animals. - Q:- With a neat diagram explain the 7-celled, 8-nucleate nature of the female gametophyte.
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Recently Viewed Questions of Class 12th biology
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(a) Abortions could happen spontaneously too. (True/False)
(b) Infertility is defined as the inability to produce a viable offspring and is always due to abnormalities/defects in the female partner. (True/False)
(c) Complete lactation could help as a natural method of contraception. (True/False)
(d) Creating awareness about sex related aspects is an effective method to improve reproductive health of the people. (True/False) - Q:- Draw a labeled diagram of female reproductive system.
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(a) Hibernation and Aestivation
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(a) Androgens are produced by Sertoli cells. (True/False)
(b) Spermatozoa get nutrition from Sertoli cells. (True/False)
(c) Leydig cells are found in ovary. (True/False)
(d) Leydig cells synthesise androgens. (True/False)
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(f) Menstrual cycle ceases during pregnancy. (True/False)
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(a) Corpus luteum
(b) Endometrium
(c) Acrosome
(d) Sperm tail
(e) Fimbriae - Q:- Draw a labeled diagram of a section through ovary.
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Biogas, Citric acid, Penicillin and Curd