Q. No.Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A):
Cleavage increases the number of cells and nuclear mass without increasing the cytoplasmic mass.
Reason (R):
With each successive subdivision, there is roughly half the cytoplasm in each daughter cell than before that division.
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.
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
| Assertion (A): | Fertilization occurs in the fallopian tube. |
| Reason (R): | The released oocyte must be fertilized within 24 hours of its release. |
| 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 humans, sex is determined at the time of fertilization. |
| Reason (R): | The Y chromosome is the male determining factor in humans. |
| 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. |
Which of the following is not a male accessory sex gland?
1. Bulbourethral gland
2. Testis
3. Prostate
4. Seminal vesicles
Ovaries are the primary sex organs in human females because they:
I. Produce the female gamete
II. Produce the hormone that regulates the development of secondary sexual characters
1. Both I and II
2. Only I
3. Only II
4. None
FSH:
1. Acts on Sertoli cells and stimulates secretion of some factors that help in spermiogenesis
2. Acts on Sertoli cells and inhibits secretion of some factors that help in spermiogenesis
3. Acts on Leydig cells and stimulates secretion of some factors that help in spermiogenesis
4. Acts on Leydig cells and inhibits secretion of some factors that help in spermiogenesis
The functions of male sex accessory ducts and glands are maintained by:
1. Hypothalamic releasing hormone
2. Pituitary gonadotropins
3. Adrenal cortex steroids
4. Testicular androgens
At the birth of the female child, the follicles in her ovaries contain:
| 1. | Primary oocytes that have been arrested at the S phase of the cell cycle |
| 2. | Primary oocytes that have been arrested at the Prophase I of Meiosis I |
| 3. | Secondary oocytes that have been arrested at the Prophase I of Meiosis I |
| 4. | Secondary oocytes that have been arrested at the Metaphase II of Meiosis II |
What is released at ovulation?
1. Primary oocyte arrested at meiosis I
2. Primary oocyte arrested at meiosis II
3. Secondary oocyte arrested at meiosis I
4. Secondary oocyte arrested at meiosis II
LH surge:
| 1. | is a sudden dramatic increase in the levels of LH during the early part of the menstrual cycle and is responsible for ovulation |
| 2. | is a sudden dramatic decrease in the levels of LH during the early part of the menstrual cycle and is responsible for ovulation |
| 3. | is a sudden dramatic decrease in the levels of LH during the mid-menstrual cycle and is responsible for ovulation |
| 4. | is a sudden dramatic increase in the levels of LH during the mid-menstrual cycle and is responsible for ovulation |
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