(a) Explain the menstrual phase in a human female. State the levels of ovarian and pituitary hormones during this phase

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Q 2684580457.     (a) Explain the menstrual phase in a human female. State the levels of ovarian and
pituitary hormones during this phase.
(b) Why is follicular phase in the menstrual cycle also referred as proliferative
phase? Explain.
(c) Explain the events that occur in a graafian follicle at the time of ovulation and
thereafter.
(d) Draw a graafian follicle and label antrum and secondary oocyte [3]
OR
(a) As a senior biology student you have been asked to demonstrate to the students
of secondary level in your school, the procedure (s) that shall ensure cross –
pollination in a hermaphrodite flower. List the different steps that you would
suggest and provide reasons for each of the item.
(b) Draw a diagram of a section of a megasporangium of an angiosperm and label
funiculus, Micropyle, embryosac and nuclleus.
CBSE-12th 2016

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(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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