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8.1 Reproductive Organs — Test 1
Q1. A newborn male has a palpable right testis but no left testis in the scrotum, with no other abnormality. The most likely cause is:✓ Incomplete descent (cryptorchidism)
Q2. Testicular descent is NOT influenced by:✓ Inhibin
Q3. Which of the following is a form of SEXUAL reproduction?✓ Hermaphroditism
Q4. In mammals, the testes are located in the scrotum (outside the body) mainly because:✓ Sperm production needs a temperature below core body temperature
Q5. The functional unit of the testis where sperm are produced is the:✓ Seminiferous tubule
Q6. Sertoli cells in the testis function to:✓ Support and nourish developing sperm cells
Q7. Leydig cells of the testis secrete:✓ Testosterone
Q8. The functional unit of the ovary that contains the developing egg is the:✓ Ovarian follicle
Q9. After ovulation, the ruptured follicle transforms into the:✓ Corpus luteum
Q10. A species in which an individual has both male and female reproductive organs is described as:✓ Hermaphrodite
Q11. In animals with separate sexes (males and females in different individuals), the condition is called:✓ Gonochorism (dioecy)
Q12. Parthenogenesis is a reproductive pattern in which:✓ An egg develops into an organism without fertilization
Q13. In honeybees, males (drones) develop from unfertilised eggs, an example of:✓ Arrhenotokous parthenogenesis (haplodiploidy)
Q14. The duct that carries sperm from the epididymis toward the urethra is the:✓ Vas deferens
Q15. In the female, fertilization normally occurs in the:✓ Fallopian tube (oviduct)
Q16. Animals that breed only during a particular season of the year are called:✓ Seasonal breeders
Q17. The blood-testis barrier formed by Sertoli cells is important because it:✓ Protects developing sperm and isolates them from the immune system
Q18. The epididymis functions mainly to:✓ Store sperm and allow them to mature and become motile
Q19. Internal fertilization (versus external) is generally favoured in terrestrial animals because it:✓ Protects gametes from drying out and increases fertilization success
Q20. Oviparous animals are those that:✓ Lay eggs that develop and hatch outside the mother's body