Q. No.
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Grey crescent is the area
1. at the point of entry of sperm into ovum
2. just opposite to the site of entry of sperm into ovum
3. at the animal pole
4. at the vegetal pole
Which of the following statements is correct?
1. Monkey, apes and humans exhibit estrous cycle.
2. Urine is pale yellow and slightly alkaline.
3. Lots of enzymes are present in bile juice.
4. Ovulation in humans is spontaneous
The 'cells of Rauber' are
1. secretory cells of endometrium in uterus
2. inner cell mass of blastocoel
3. outer cells of trophoblast in contact with uterine wall
4. cells of trophoblast, in contact with inner cell mass of blastocyst.
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
| Assertion (A): | A moist habitat is almost always required for external fertilization. |
| Reason (R): | A moist habitat prevents the drying of gametes and allows sperms to swim to ova. |
| 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. |
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
| Assertion (A): | All mammalian embryos will develop into females unless a functional SRY gene is present. |
| Reason (R): | SRY gene is non-functional in a female zygote. |
| 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. |
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
| Assertion (A): | Sperms constitute the majority of the volume of the semen ejaculated. |
| Reason (R): | There are about 300 million sperms per ml of the ejaculate. |
| 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. |
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
| Assertion (A): | It is important that the secondary oocyte aquires almost all of the cytoplasm from the primary oocyte. |
| Reason (R): | This increases its chances of sustaining the early embryo should the oocyte be fertilized. |
| 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. |
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
| Assertion (A): | In the absence of fertilization, the corpus luteum degenerates into a corpus albicans. |
| Reason (R): | The levels of estrogen and progesterone are highly reduced towards the end of the luteal phase. |
Choose the most appropriate answer:
| 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. |
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
| Assertion (A): | If the pituitary gland is removed, spermatogenesis can still be initiated by follicle stimulating hormone (FSH) and testosterone. |
| Reason (R): | In contrast to FSH, LH appears to have little role in spermatogenesis outside of inducing gonadal testosterone production. |
In the light of the above statements, choose the most appropriate answer from the options given below :
| 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. |
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