Select Chapter Topics:
Q. No.
Unlock IMPORTANT QUESTION
This question was bookmarked by 5 NEET 2025 toppers during their NEETprep journey. Get Target Batch to see this question.
✨ Perfect for quick revision & accuracy boost
Buy Target Batch
Access all premium questions instantly
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.
Subtopic: Embryonic Development till Gastrulation | Fertilization |
Level 3: 35%-60%
Hints
Assertion(A): Parturition is peristalsis expulsion of foetus through birth canal.
Reason(R): Oxytocin stimulates peristalsis in uterus and also ejection of milk.
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.
Reason(R): Oxytocin stimulates peristalsis in uterus and also ejection of milk.
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.
Subtopic: Fetal Development & Parturition |
54%
Level 3: 35%-60%
Hints
| 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. |
Subtopic: Introduction to Menstrual Cycle: 1 | Introduction to Menstrual Cycle: 2 | Menstrual Cycle: Luteal Phase | Menstrual Cycle |
73%
Level 2: 60%+
Hints
| 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. |
Subtopic: Menstrual Cycle: Pre Ovulatory Phase | Menstrual Cycle: Luteal Phase |
67%
Level 2: 60%+
Hints
Assertion(A): Corpus luteum start degenerating after fertilisation.
Reason(R): Corpus luteum secretes hormone responsible for 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.
Reason(R): Corpus luteum secretes hormone responsible for 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.
Subtopic: Menstrual Cycle: Pre Ovulatory Phase | Menstrual Cycle: Luteal Phase |
72%
Level 2: 60%+
Hints
| Assertion (A): | All copulations do not lead to fertilisation and pregnancy. |
| Reason (R): | Fertilisation can occur only if the ovum and sperms are transported simultaneously to ampullary isthmic junction. |
| 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. |
Subtopic: Fertilization: Part 1 | Fertilization: Part 2 | Fertilization |
91%
Level 1: 80%+
Hints
Assertion(A): Only one sperm can fertilise an ovum.
Reason(R): During fertilisation, a sperm comes in contact with the zona pellucida layer of ovum and induces changes in the membrane that blocks the entry of additional sperms.
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.
Reason(R): During fertilisation, a sperm comes in contact with the zona pellucida layer of ovum and induces changes in the membrane that blocks the entry of additional sperms.
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.
Subtopic: Fertilization: Part 1 | Fertilization: Part 2 | Fertilization |
95%
Level 1: 80%+
Hints
| 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. |
Subtopic: Fetal Development & Parturition | Implantation |
81%
Level 1: 80%+
Hints
| 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. |
Subtopic: Introduction to Menstrual Cycle: 2 | Menstrual Cycle: Pre Ovulatory Phase | Menstrual Cycle: Luteal Phase | Menstrual Cycle |
86%
Level 1: 80%+
Hints
| 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. |
Subtopic: Fetal Development & Parturition |
79%
Level 2: 60%+
Hints
Select Chapter Topics:
© 2026 GoodEd Technologies Pvt. Ltd.