The _________ is a temporary organ that connects a mammalian mother to its foetus.

Correct Answer: A

Rationale: The correct answer is A: Placenta. The placenta is a temporary organ that connects a mammalian mother to its foetus by facilitating the exchange of nutrients, gases, and waste products between the mother and the developing baby. It also produces hormones necessary for pregnancy. Explanation of other choices: B: Chorion - The chorion is a membrane that surrounds the embryo and contributes to the formation of the placenta, but it is not the organ that directly connects the mother to the foetus. C: Endometrium - The endometrium is the inner lining of the uterus where implantation of the fertilized egg occurs, but it is not the organ that connects the mother to the foetus. D: None of the above - This choice is incorrect as the placenta is indeed the temporary organ that serves as the connection between the mother and the foetus in mammalian reproduction.

Correct Answer: C

Rationale: The correct answer is C: Ovary. Line "C" is pointing to the ovary because it is the reproductive organ responsible for producing eggs and hormones in females. The ovary is located near the fimbriae and not the bladder or uterus. The fimbriae are finger-like projections near the ovary that help guide the released egg into the fallopian tube. The bladder is an organ unrelated to reproduction, and the uterus is a separate reproductive organ responsible for housing a developing fetus. Therefore, the correct choice is the ovary as it aligns with the function and location indicated by the diagram.

Correct Answer: A

Rationale: The correct answer is A: SRY. The Sex-determining Region Y (SRY) gene is the master switch for male development. It initiates the development of male gonads. Choice B, MIS, is a hormone involved in female reproductive development. Choices C and D, XYY and XXY, are genetic conditions related to male chromosomal variations and are not the master switch gene for male development.

Correct Answer: B

Rationale: The correct answer is B: Graafian follicle. Within the ovary, thousands of small sacs called follicles develop and grow, with one dominant follicle eventually maturing into a Graafian follicle. This structure contains the ovum (egg) and is released during ovulation. Ova (A) are the mature eggs released from the Graafian follicle. Corpus luteum (C) forms after ovulation and produces hormones to support pregnancy. Cysts (D) are abnormal fluid-filled sacs that can develop in the ovaries, different from the normal follicles.

Correct Answer: A

Rationale: Step-by-step rationale: 1. Hypospadias is the congenital opening of the male urethra on the undersurface of the penis. 2. This condition results from incomplete closure of the urethral folds during fetal development. 3. Phimosis is the inability to retract the foreskin over the glans penis. 4. Epispadias is the congenital opening of the male urethra on the upper surface of the penis. 5. Herpes is a viral infection causing painful sores, but not related to the location of the urethral opening. Summary: Hypospadias is correct as it matches the description of the condition, while the other choices describe different conditions not related to the location of the urethral opening.