This connects the ovary to the uterus.

Correct Answer: B

Rationale: The correct answer is B: Cervix. The cervix is the narrow passage that connects the uterus to the vagina. It acts as a barrier between the uterus and the outside environment. The other choices are incorrect because: A: Vagina is the birth canal and does not directly connect the ovary to the uterus. C: Fallopian tube connects the ovary to the uterus but does not directly attach to it. D: Perineorrhaphy is a surgical procedure to repair the perineum and is not related to connecting the ovary to the uterus.

Correct Answer: C

Rationale: The correct answer is C because spermatogenesis occurs within the convoluted seminiferous tubules of the testes. This is where sperm cells are produced through a series of cell divisions and maturation processes. Choice A is incorrect as spermatogenesis does not occur at the level of testicular interstitial cells, which are responsible for hormone production. Choice B is also incorrect as Leydig cells are responsible for testosterone production, not sperm production. Choice D is incorrect as spermatogenesis actually begins during puberty, typically around the age of 12-13, not specifically at the age of 14.

Correct Answer: A

Rationale: The correct answer is A because the ejaculatory duct is formed by the joining of the deferent duct (vas deferens) with the seminal vesicle duct. This is important for transporting sperm and seminal fluid towards the urethra for ejaculation. Choice B is incorrect because the ejaculatory duct does not open directly into the urethra; rather, it joins with the urethra. Choice C is incorrect as the ejaculatory duct is not extratesticular; it is located within the prostate gland. Choice D is incorrect as the ejaculatory duct is not located within the testicle; it is formed outside the testicle by the union of other structures.

Correct Answer: D

Rationale: The correct answer is D because the spermatozoon contains the Y sex chromosome, determining male characteristics. Sperm cells are haploid and carry only one set of chromosomes, including either an X or Y sex chromosome. The presence of the Y chromosome leads to the development of male offspring. Choice A is incorrect as sperm cells do not contain somatic chromosomes. Choice B is incorrect as sperm cells contain one pair of sex chromosomes, not just one. Choice C is incorrect because sperm cells can carry either the X or Y sex chromosome, not specifically the X chromosome.

Correct Answer: A

Rationale: The correct answer is A: the uterus. The ovary connects to the uterus via ligaments called ovarian ligaments. This connection is essential for the transfer of eggs from the ovary to the uterus during the menstrual cycle and for providing support to the ovary. The other choices are incorrect as the ovary does not directly connect to the Fallopian tubes (B), rectum (C), or pelvic walls (D) via ligaments. The connection to the uterus is crucial for reproductive functions and maintaining the structural integrity of the female reproductive system.