Assertion(A): | Holoblastic cleavage with almost equal sized blastomeres is a characteristics of placental animals. |
Reason(R): | Eggs of most mammals including humans are of centrolecithal type. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |
Assertion(A): | Corpus luteum are cells produced by Graafian follicle after ovulation. |
Reason(R): | It secretes estrogen, which is necessary to maintain pregnancy. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |
Assertion(A): | The endometrium of a 35 years old pregnant lady fails to degenerate. |
Reason(R): | Progesterone concentration increases due to fertilisation. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |
Assertion(A): | During early pregnancy, hCG prevents the disintegration of corpus luteum. |
Reason(R): | Under the influence of hCG, the corpus luteum continues to produce progesterone which keeps endometrium intact. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |
Assertion(A): | A pregnant woman cannot concieve again during pregnancy. |
Reason(R): | Corpus luteum secretes high level of progesterone and estrogen during pregnancy which inhibits the secretion of gonadotropins and thereby prevent ovulation. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |
Assertion(A): | Soon after the infant is delivered, the placenta is also expelled out of the uterus. |
Reason(R): | Expulsion of placenta is called parturition. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |