List I | List II |
A. Acrosome | I. Gonadotropin |
B. Corpus luteum | II. Hyaluronidase |
C. Leydig cells | III. Estrogen |
D. Hypothalamus | IV. Testosterone |
a. | Interstitial spaces of testis contain Leydig cells and other immunologically competent cells. |
b. | Testes are situated inside the abdominal cavity within a pouch called scrotum. |
c. | The scrotum helps in maintaining the low temperature necessary for spermatogenesis. |
d. | Each lobule of testis contains 250 seminiferous tubules in which sperms are produced. |
Column-I | Column-II | ||
a. | Milk | (i) | Spermatids are transformed into spermatozoa |
b. | Primary spermatocyte | (ii) | Stored in the cavity of alveoli |
c. | Spermiogenesis | (iii) | First menstruation begins at puberty |
d. | Menarche | (iv) | Periodically undergo meiosis |
(a) | Spermatogonia produce sperm cells by spermatogenesis that begins at puberty. |
(b) | All spermatogonia periodically undergo meiosis. |
(c) | A primary spermatocyte completes first meiotic division during embryonic development. |
(d) | The secondary spermatocytes have only 23 chromosomes each. |
Assertion (A): | During pregnancy, the level of several hormones like estrogens, progestogens, cortisol, prolactin, thyroxine, etc are increased several folds in the maternal blood. |
Reason (R): | Increased production of these hormones is essential for supporting the foetal growth, metabolic changes in the mother, and maintenance of pregnancy. |
1. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
2. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | (A) is false but (R) is true. |
(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. |
Column I | Column II | ||
a. | Breasts in lactating mothers | (i) | Presence or absence is not a reliable indicator of virginity |
b. | Colostrum | (ii) | Cushion of fatty tissue covered by skin and pubic hairs |
c. | Mons pubis | (iii) | Contains several antibodies absolutely essential for newborns |
d. | Hymen | (iv) | 15-20 mammary lobes each |
Column I | Column II | ||
a. | Perimetrium | (i) | Inner glandular layer of uterus |
b. | Myometrium | (ii) | External thin membrane of uterus |
c. | Endometrium | (iii) | Middle thick layer of smooth muscles |
Assertion(A): | In humans, all copulations cannot lead to fertilisation and pregnancy |
Reason (R): | Ferrtilisation can only occur if the ovum and sperms are transported simultaneously to the ampulla |
1. | Both (A) and (R) are true and (R) is not the correct explanation of (A) |
2. | Both (A) and (R) are true and (R) is the correct explanation of (A) |
3. | (A) is true but (R) is false |
4. | (A) is false but (R) is true |