Reproductive Biology and Development - One Line Questions

1. What is the morula stage of embryonic development? — A solid ball of cells resulting from cleavage
2. What is the corpus luteum? — The structure formed in the ovary after ovulation, producing progesterone
3. What is the blastocyst stage of embryonic development? — A hollow ball of cells with an inner cell mass
4. Which of the following is NOT a component of the amniotic egg? — Blastocoel
5. Which organ system is typically the first to become functional in a developing embryo? — Nervous system
6. Which germ layer forms the lining of the digestive tract and respiratory system? — Endoderm
7. What are the stages of complete metamorphosis in insects? — Egg, larva, pupa, adult
8. Which germ layer gives rise to the nervous system and epidermis? — Ectoderm
9. Which germ layer is responsible for forming muscles, bones, and the circulatory system? — Mesoderm
10. What is the primary male reproductive organ in mammals that produces sperm and androgens? — Testis
11. Which hormone is primarily responsible for the development of male secondary sexual characteristics? — Testosterone
12. Which hormone plays a crucial role in initiating and maintaining labor contractions? — Oxytocin
13. What is the primary female reproductive organ that produces eggs and hormones like estrogen and progesterone? — Ovary
14. What is the main advantage of sexual reproduction over asexual reproduction? — Increases genetic diversity
15. What is the process by which the early embryo attaches to the uterine wall? — Implantation
16. What is polyspermy? — Fertilization by multiple sperm
17. Which type of twinning occurs when a single fertilized egg splits into two embryos? — Identical twins
18. Which of the following is an example of internal fertilization? — Insects
19. What is parthenogenesis? — Development of an embryo from an unfertilized egg
20. What is the term for the period of development from fertilization to birth? — Gestation
21. Oviparity refers to reproduction by: — Laying eggs
22. Which group of animals typically undergoes complete metamorphosis? — Butterflies
23. What is the ploidy level of a zygote formed by the fusion of two gametes? — Diploid (2n)
24. Which of the following is an example of external fertilization? — Fish reproduction (e.g., spawning)
25. What is the term for the expulsion of the fetus from the uterus? — Parturition
26. Viviparity refers to reproduction by: — Giving birth to live young
27. Which process involves the fusion of male and female gametes? — Fertilization
28. What event marks the beginning of puberty in females? — Menstruation
29. Which process reduces the chromosome number by half, producing haploid gametes from diploid cells? — Meiosis
30. What is the term for the production of gametes? — Gametogenesis
31. In humans, where does fertilization typically occur? — Fallopian tube
32. What is the function of the uterus in the female reproductive system? — Site of embryonic and fetal development
33. What is the primary function of the yolk in an amniotic egg? — Nutrient supply for the developing embryo
34. Which term describes the reproductive strategy where large numbers of small eggs are produced with little parental care? — Semelparity
35. Which structure in the male reproductive system stores and matures sperm? — Epididymis
36. In which type of reproduction do offspring arise from a single organism or cell, without the involvement of gametes? — Asexual Reproduction
37. Which of the following is a form of asexual reproduction? — Budding
38. Which hormone is primarily responsible for the development of female secondary sexual characteristics and regulating the menstrual cycle? — Estrogen
39. What is gastrulation? — The process of forming the three primary germ layers
40. What is neurulation? — The formation of the neural tube, which develops into the central nervous system
41. What is the cortical reaction during fertilization? — The hardening of the egg's outer layer to prevent polyspermy
42. What is metamorphosis in the context of development? — A significant transformation in body structure from one developmental stage to another
43. What is ovulation? — The release of a mature egg from the ovary
44. What is the placenta? — The organ that develops in the uterus during pregnancy, providing oxygen and nutrients to the fetus
45. What is the function of the allantois in an amniotic egg? — To facilitate gas exchange and store nitrogenous waste
46. What is the role of the acrosome in a sperm cell? — To release enzymes that help penetrate the egg
47. What is the primary function of gametes in sexual reproduction? — To carry genetic material for fertilization
48. What is the function of the amniotic fluid? — To protect the fetus from shock and maintain a constant temperature
49. What is the function of the umbilical cord? — To connect the fetus to the placenta for nutrient and gas exchange
50. What is the primary role of prolactin in reproduction? — To stimulate milk production after birth
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