A. | In non-primate mammals, cyclical changes during reproduction are called oestrus cycle. |
B. | First menstrual cycle begins at puberty and is called menopause. |
C. | Lack of menstruation may be indicative of pregnancy. |
D. | Cyclic menstruation extends between menarche and menopause. |
1. | A, C and D only | 2. | A and D only |
3. | A and B only | 4. | A, B and C only |
Assertion (A): | Endometrium is necessary for implantation of blastocyst. |
Reason (R): | In the absence of fertilization, the corpus luteum degenerates that causes disintegration of endometrium. |
1. | (A) is False but (R) is True. |
2. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
3. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
4. | (A) is True but (R) is False. |
Which of the following hormone levels will cause release of ovum (ovulation) from the Graafian follicle?
1. High concentration of Progesterone
2. Low concentration of LH
3. Low concentration of FSH
4. High concentration of estrogen