- 1(current)
Q. No.How many statements given below are correct?
1. 2
2. 1
3. 4
4. 3
| (i) | Relaxin is secreted by the ovary in the later phase of pregnancy. |
| (ii) | Inner cell mass differentiates into ectoderm and endoderm just before implantation. |
| (iii) | Implantation leads to pregnancy. |
| (iv) | Embryo with 8 to 16 blastomeres is called morula. |
2. 1
3. 4
4. 3
Subtopic: Embryonic Development till Gastrulation | Fertilization | Implantation |
65%
From NCERT
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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.
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 |
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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.
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 |
90%
From NCERT
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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 |
94%
From NCERT
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Read the following statements :
(i) Both estrogen and progesterone are necessary for ovulation to take place
(ii) Estrogen tends to inhibit the secretion of FSH from the anterior pituitary gland
(iii) Fertilization of the ovum by the spermatozoan normally takes place in the uterus
(iv) Progesterone production is largely under the control of LH
(v) Throughout the part of menstrual cycle that follows ovulation, there is slight rise in body temperature
How many of the above statements are correct?
1. Two
2. Three
3. Four
4. One
(i) Both estrogen and progesterone are necessary for ovulation to take place
(ii) Estrogen tends to inhibit the secretion of FSH from the anterior pituitary gland
(iii) Fertilization of the ovum by the spermatozoan normally takes place in the uterus
(iv) Progesterone production is largely under the control of LH
(v) Throughout the part of menstrual cycle that follows ovulation, there is slight rise in body temperature
How many of the above statements are correct?
1. Two
2. Three
3. Four
4. One
Subtopic: Introduction to Menstrual Cycle: 1 | Introduction to Menstrual Cycle: 2 | Menstrual Cycle: Pre Ovulatory Phase | Menstrual Cycle: Luteal Phase | Fertilization: Part 1 | Fertilization: Part 2 | Fertilization | Introduction to Menstrual Cycle |
From NCERT
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- 1(current)
Q. No.
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