About the external male genital organ, we can state the following:

Correct Answer: B

Rationale: Step-by-step rationale for why answer B is correct: 1. The external male genital organ is represented by the urethra, which is the duct that carries urine from the bladder out of the body. 2. The urethra is responsible for both urination and ejaculation. 3. The other choices are incorrect because the external male genital organ is not part of the urinary ducts, not a pair organ, and not located above the scrotum.

Correct Answer: B

Rationale: The correct answer is B: the mature ovarian follicle. 1. Ovule formation occurs within the ovary, specifically within a structure called the ovarian follicle. 2. The mature ovarian follicle contains the ovum (oocyte) which develops into the ovule. 3. The ovule is released during ovulation from the mature ovarian follicle. In contrast, the other choices are incorrect: A: The medullar area of the ovary does not play a direct role in ovule formation. C: The Fallopian tube is where fertilization typically occurs, not ovule formation. D: The uterus is not involved in ovule formation; it is the site of embryo implantation during pregnancy.

Correct Answer: A

Rationale: The correct answer is A: the cervix. The cervix is a component of the uterus that connects the uterus to the vagina. It plays a crucial role in pregnancy, as it dilates during childbirth to allow the baby to pass through. The other choices, B: the corpus, C: the head, and D: the mid piece, are incorrect as they do not refer to components of the uterus. The corpus typically refers to the main body of an organ, while the head and mid piece are terms commonly associated with structures in cells or organisms, not the uterus.

Correct Answer: D

Rationale: The correct answer is D because the sex of the child is determined by the sex chromosome carried by the spermatozoon that fertilizes the ovule. Sperm carries either an X or a Y chromosome, determining if the child will be male (XY) or female (XX). Choices A and B are incorrect because the type of spermatozoon or ovule does not solely determine the child's sex. Choice C is incorrect as well because the sex chromosome of the ovule alone does not determine the child's sex.

Correct Answer: B

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.