Review the statements concerning the structure and glands of the human penis:
(I) The penis is the male external genitalia and is made of erectile tissue to facilitate insemination. (II) The glans penis is covered by a loose fold of skin called the foreskin. (III) Secretions of bulbourethral glands help in the lubrication of the penis. (IV) The prostate is a paired gland whose secretion contributes to the bulk of semen.
Explanation: Statements (I), (II), and (III) are correct. Statement (IV) is incorrect because the prostate is an unpaired, single gland, whereas the seminal vesicles and bulbourethral glands are paired.
Question 92 of 100
📘 CLASS XII
Identify the correct statement combination regarding the female ovaries and pelvic connections:
(I) Ovaries are primary female sex organs producing ova and steroid hormones. (II) Each ovary is about 10–12 cm in length. (III) Ovaries are connected to the pelvic wall and uterus by ligaments. (IV) Each ovary is covered by a thin epithelium enclosing the stroma.
Explanation: Statements (I), (III), and (IV) are correct. Statement (II) is incorrect because each ovary is about 2 to 4 cm in length (fallopian tubes are 10–12 cm long).
Question 93 of 100
📘 CLASS XII
Read the statements below regarding the layers of the human uterus:
(I) The outer thin membranous layer is the perimetrium. (II) The middle thick layer of smooth muscle is the myometrium. (III) The inner glandular layer lining the uterine cavity is the endometrium. (IV) The myometrium undergoes cyclical changes during the menstrual cycle.
Explanation: Statements (I), (II), and (III) are correct. Statement (IV) is incorrect because the endometrium (not the myometrium) undergoes cyclical changes during the menstrual cycle, whereas the myometrium exhibits strong contractions during parturition.
Question 94 of 100
📘 CLASS XII
Regarding the female external genitalia, select the correct statements:
(I) Mons pubis is a cushion of fatty tissue covered by skin and pubic hair. (II) Labia majora are fleshy folds of tissue extending down from the mons pubis. (III) Labia minora are paired folds of tissue under the labia majora. (IV) The clitoris is a finger-like structure at the lower junction of the labia minora.
Explanation: Statements (I), (II), and (III) are correct. Statement (IV) is incorrect because the clitoris lies at the upper junction of the two labia minora (above the urethral opening), not the lower junction.
Question 95 of 100
📘 CLASS XII
Analyze the statements regarding oogenesis and follicular development:
(I) Oogenesis is initiated during female embryonic development. (II) At puberty, only about 60,000 to 80,000 primary follicles are left in each ovary. (III) Primary follicles transform into secondary follicles by adding more granulosa cells and a new theca. (IV) The secondary follicle is characterized by a fluid-filled cavity called the antrum.
Explanation: Statements (I), (II), and (III) are correct. Statement (IV) is incorrect because the fluid-filled cavity called the antrum is a characteristic feature of the tertiary follicle, not the secondary follicle.
Question 96 of 100
📘 CLASS XII
Concerning the first meiotic division of oogenesis, choose the correct statements:
(I) The first meiotic division is completed within the tertiary follicle stage. (II) It is an equal meiotic division resulting in two secondary oocytes. (III) It produces a large haploid secondary oocyte and a tiny first polar body. (IV) The secondary oocyte retains the bulk of the nutrient-rich cytoplasm of the primary oocyte.
Explanation: Statements (I), (III), and (IV) are correct. Statement (II) is incorrect because the first meiotic division is an unequal division.
Question 97 of 100
📘 CLASS XII
Read the statements below regarding the phase of ovulation:
(I) The tertiary follicle changes into a mature Graafian follicle. (II) The secondary oocyte forms a new membrane called the zona pellucida. (III) The Graafian follicle ruptures to release the secondary oocyte during ovulation. (IV) The released gamete is arrested in the primary oocyte stage.
Explanation: Statements (I), (II), and (III) are correct. Statement (IV) is incorrect because the gamete released during ovulation is the secondary oocyte (which completed meiosis-I), not the primary oocyte.
Question 98 of 100
📘 CLASS XII
Select the correct statements regarding the follicular phase of the menstrual cycle:
(I) Primary follicles grow to become fully mature Graafian follicles. (II) The endometrium of the uterus undergoes proliferation and regeneration. (III) These changes are induced by pituitary gonadotropins and ovarian hormones. (IV) Secretions of LH and FSH decrease gradually during this phase to allow follicle growth.
Explanation: Statements (I), (II), and (III) are correct. Statement (IV) is incorrect because the secretion of LH and FSH increases gradually (not decreases) during the follicular phase, stimulating both follicular development and estrogen secretion.
Question 99 of 100
📘 CLASS XII
Examine the statements regarding fertilisation in the female reproductive tract:
(I) Semen is released into the vagina during insemination. (II) Motile sperms pass through the cervix and uterus to reach the isthmus. (III) Fertilisation occurs when sperm and ovum are simultaneously transported to the ampullary region. (IV) Not all copulations lead to pregnancy because of timing requirements in transport.
Explanation: Statements (I), (III), and (IV) are correct. Statement (II) is incorrect because the sperms must reach the ampullary region of the fallopian tube for fertilisation, not the isthmus.
Question 100 of 100
📘 CLASS XII
Read the following statements concerning the cortical/membrane changes during fertilisation:
(I) The sperm comes in contact with the zona pellucida layer of the ovum. (II) This contact induces changes in the membrane that block the entry of additional sperms. (III) This mechanism ensures that only one sperm fertilises the ovum. (IV) Secretions of the sperm neck help the sperm penetrate the zona pellucida.
Explanation: Statements (I), (II), and (III) are correct. Statement (IV) is incorrect because the secretions of the acrosome (not the neck) help the sperm enter the cytoplasm of the ovum.
