Long Answer Type(a) Draw a diagrammatic sectional view of the female reproductive system of human and label the parts:
(i) where the secondary oocytes develop
(ii) which helps in collection of ovum after ovulation
(iii) where fertilization occurs
(iv) where implantation of embryo occurs.
(b) Explain the role of pituitary and the ovarian hormones in menstrual cycle in human females.(a) View of the female reproductive system of human
(b) Changes happening in ovary and uterus during menstrual cycle are caused by change in the levels of pituitary and ovarian hormones.
After menstrual phase gonadotropin i.e., Luteinising hormone (LH) and follicular stimulating hormone (FSH) are released from pituitary. Their level gradually increases during follicular phase and it stimulates development of follicles and secretion of estrogen by growing follicles.
Both LH and FSH attain peak on 13th & 14th day.
Rapid secretion LH causes ovulation on day 14.
During luteal phases Graafian follicle changes to corpus luteum which secretes Progesterone Progesterone maintains endometrium which is necessary for implantation.
Describe the asexual and sexual phases of life cycle of Plasmodium that causes malaria in humans.
(a) What is plant breeding? List the two steps the classical plant breeding involves.
(b) How has the mutation breeding helps in improving crop varieties? Give one example where this technique has helped.
(c) How has the breeding programme helped in improving the public nutritional health? State two examples in support of your answer.A child by the family from Thalassemia is born to a normal couple. But the mother is being blamed by the family for delivering a sick baby. (a) What is Thalassemia?
(b) How would you counsel the family not to blame the mother for delivering a child suffering from this disease? Explain.
(c) List the values your counseling can propagate in the families.
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