1. Binary fission occurs in:
(a) Amoeba
(b) Paramecium
(c) Planaria
(d) All of the above.
Answer : (d) All of the above
2. Which one of the following is concerned with asexual reproduction?
(a) Zygote
(b) Spores
(c) Gametes
(d) Gonads
Answer : (b) Spores
3. The most fundamental characteristics of living beings:
(a) Movement
(b) Growth
(c) Fragmentation
(d) Reproduction
Answer : (d) Reproduction
4. Isogametes are:
(a) Morphologically alike
(b) functionally alike
(c) Sterile
(d) Those who develop parthenogenetically
Answer : (a) Morphologically alike
5. Fusion of two dissimilar gametes is known as:
(a) Allogamy
(b) Anisogamy
(c) Autogamy
(d) Dichogamy
Answer : (b) Anisogamy
6. Fusion of gametes is known as:
(a) Karyogamy
(b) Amphimixis
(c) Syngamy
(d) Hemixis
Answer : (c) Syngamy
7. Young girls at puberty begin to develop breast; this is an example of :
(a) Metamorphosis
(b) Sexual growth (appearance of secondary sexual characters)
(c) Appearancence of primitive characters
(d) Artificial selection
Answer : (b) Sexual growth
8. Which one is a primary sex organ?
(a) Testis
(b) Scrotum
(c) Prostate
(d) Penis
Answer : (a) Testis
9. Which of the following is a secondary sex organ?
(a) Ovary
(b) Penis
(c) Beard
(d) Broad hips
Answer : (b) Penis
10. Uterus of the female reproductive system is:
(a) Primary sex organ
(b) Secondary sex organ
(c) Accessory sex organ
(d) External sex organ
Answer : (b) Secondary sex organ
11. Voice is low pitched in:
(a) Adult males
(b) Adult females
(c) Aged persons
(d) All of the above
Answer : (a) Adult males
12. Egg-laying animals are known as:
(a) Viviparous
(b) Oviparous
(c) Sterile
(d) Hermaphrodite
Answer : (b) Oviparous
13. Which one is an oviparous animal?
(a) Penguin
(b) Whale
(c) Bat
(d) Amoeba
Answer : (a) Penguin
14. Development of eggs without fertilization is called
(a) Parthenogenesis
(b) Gametogenesis
(c) Metagenesis
(d) Oogenesis
Answer : (a) Parthenogenesis
15. The lytic enzyme released by sperm is:
(a) Ligase
(b) Acrosome
(c) Androgamase
(d) Hyaluronidase
Answer : (d) Hyaluronidase
16. Natural parthenogenesis occurs in:
(a) Protozoans
(b) Earthworms
(c) All insects
(d) Honey bees
Answer : (d) Honey bees
17. The type of parthenogenesis in which the males develops from unfertilized eggs and the females from fertilised eggs is known as :
(a) Thelytoky
(b) Arrhenotoky
(c) Gynogenesis
(d) Apospory
Answer : (b) Arrhenotoky
18. Gonads are derived from
(a) Ectoderm
(b) Endoderm
(c) Mesoderm
(d) None
Answer : (c) Mesoderm
19. In many animals, testes remain outside the body cavity in scrotal sacs because :
(a) It helps in coitus
(b) It helps in the ejection of semen
(c) Sperm produced in it are more active
(d) Spermatogenesis occurs at a temperature lower than the body temperature
Answer : (d) Spermatogenesis occurs at a temperature lower than the body temperature
20. Mesorchium refers to:
(a) Capsule in the testis of frog
(b) Capsule in the ovary of rabbit
(c) A peritoneal fold that connects the testis and kidney in the frog.
(d) A peritoneal fold that connects the ovary and kidney in the frog
Answer : (c) A peritoneal fold that connects the testis and kidney in the frog.
21. In mammals failure of the testis to descend into the scrotum is known as:
(a) Cryptorchidism
(b) Castration
(c) Impotency
(d) Paedogenesis
Answer : (a) Cryptorchidism
22. Scrotal sac of man and rabbit are connected with the abdominal cavity by:
(a) Spermatic canal
(b) Inguinal canal
(c) Vaginal cavity
(d) Haversian Canal
Answer : (b) Inguinal canal
23. Seminiferous tubules occurs in:
(a) Liver
(b) Kidney
(c) Testis
(d) Ovary
Answer : (c) Testis
24. During differentiation the spermatids remain associated with:
(a) Sertoli Cells
(b) Leydig Cells
(c) Kupffer's Cells
(d) Spermatogonia
Answer : (a) Sertoli Cells
25. Sertoli cells are found:
(a) between the seminiferous tubules
(b) in the germinal epithelium of the ovary
(c) in the upper part of the fallopian tube
(d) in the germinal epithelium of seminiferous tubules
Answer : (d) in the germinal epithelium of seminiferous tubules
26. Reproduction of the immature larval stage of animals caused by the acceleration of maturation is called:
(a) Cladogenesis
(b) Paedogenesis
(c) Morphogenesis
(d) Parthenogenesis
Answer : (b) Paedogenesis
27. Location of Leydig cells and their secretions are:
(a) Ovary - Estrogens
(b) Pancreas - Glucagon
(c) Testis - Testosterone
(d) Liver - Cholesterol
Answer : (c) Testis - Testosterone
28. Testes are protected in the scrotum because they:
(a) Produce heat
(b) Produce sperms
(c) help in micturition (ejaculation)
(d) Control homeostasis
Answer : (b) Produce sperms
29. Which cells present in mammalian testes help to nourish sperms?
(a) Leydig cells
(b) Interstitial cells
(c) Cells of germinal epithelium
(d) Sertoli cells
Answer : (d) Sertoli cells
30. The chemical substance found in the surface layer of the cytoplasm of spermatozoa is:
(a) fertilizin
(b) Agglutinin
(c) Antifertilizin
(d) Hyaluronidase
Answer : (c) Antifertilizin
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