Assertion (A): | Pregnancy is characterised by metabolic changes in the mother. |
Reason (R): | During pregnancy the level of thyroxine is increased in the maternal blood. |
1. | Both (A) and (R) are correct and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are correct but (R) is not the correct explanation of (A). |
3. | (A) is correct but (R) is not correct. |
4. | (A) is not correct but (R) is correct. |
Arrange the following male sex accessory ducts in the correct sequence for the transport of sperms from the testis:
(a) Epididymis
(b) Ejaculatory duct
(c) Vasa efferentia
(d) Rete testis
(e) Vas deferens
Choose the most appropriate answer from the options given below:
1. (d), (a), (c), (e), (b)
2. (d), (c), (e), (a), (b)
3. (d), (c), (a), (e), (b)
4. (d), (e), (a), (c), (b)
Which of the following hormones are secreted in women only during pregnancy?
(a) | Relaxin | (b) | Oxytocin |
(c) | hCG | (d) | hPL |
(e) | Progesterone |
Choose the most appropriate answer from the options given below:
1. (c), (d) and (e) onlyHow many Y-chromosomes are present in the 2nd polar body in human beings?
1. 01
2. 00
3. 23
4. 02
(a) | It results in the formation of haploid gametes. |
(b) | Differentiation of gamete occurs after the completion of meiosis. |
(c) | Meiosis occurs continuously in a mitotically dividing stem cell population. |
(d) | It is controlled by the Luteinising hormone (LH) and Follicle Stimulating Hormone (FSH) secreted by the anterior pituitary. |
(e) | It is initiated at puberty. |
1. (b), (c), and (e) only | 2. (c) and (e) only |
3. (b) and (c) only | 4. (b), (d) and (e) only |
Statement I: | The release of sperms from the seminiferous tubules is called spermiation. |
Statement II: | Spermiogenesis is the process of formation of sperms from spermatogonia. |
Statement I: | Vas deferens receives a duct from seminal vesicle and opens into urethra as the ejaculatory duct. |
Statement II: | The cavity of the cervix is called cervical canal which along with vagina forms birth canal. |