Reproduction in Organisms (Asexual & Sexual modes) Quiz - ICSE Class 12 Biology

Free practice quiz: Reproduction in Organisms (Asexual & Sexual modes) (ICSE Class 12 Biology). 35 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This ICSE Class 12 Biology practice quiz has 35 multiple-choice questions on Reproduction in Organisms (Asexual & Sexual modes), and 35 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. In which type of asexual reproduction is the parent cell divided into two or more daughter cells of approximately equal size?

   1. Budding
   2. Fragmentation
   3. Binary fission
   4. Spore formation
   Show answer

   Answer: C. Binary fission

   Binary fission is a process where a parent cell divides into two daughter cells of roughly equal size. This is a common mode of asexual reproduction in unicellular organisms like bacteria and amoeba.

2. What is the term for the fusion of male and female gametes to form a zygote?

   1. Gametogenesis
   2. Fertilization
   3. Cleavage
   4. Parthenogenesis
   Show answer

   Answer: B. Fertilization

   Fertilization is the biological process where male and female gametes fuse together to form a diploid zygote, initiating the development of a new organism.

3. Which of these is a unisexual flower?

   1. Hibiscus
   2. Mustard
   3. Papaya
   4. Rose
   Show answer

   Answer: C. Papaya

   A unisexual flower contains either stamens (male reproductive organs) or pistils (female reproductive organs), but not both. Papaya plants are typically dioecious, meaning they have separate male and female plants, and their flowers are unisexual. Hibiscus, mustard, and rose are generally bisexual, containing both stamens and pistils.

4. Which process ensures genetic diversity in sexually reproducing organisms?

   1. Budding
   2. Binary fission
   3. Meiosis and fertilization
   4. Vegetative propagation
   Show answer

   Answer: C. Meiosis and fertilization

   Meiosis introduces genetic variation through crossing over and independent assortment during gamete formation. Fertilization then combines genetic material from two different parents, further increasing diversity.

5. In which type of reproduction does an organism split into two or more new organisms of approximately equal size?

   1. Budding
   2. Fragmentation
   3. Binary fission
   4. Spore formation
   Show answer

   Answer: C. Binary fission

   Binary fission is a method of asexual reproduction where a parent cell divides into two genetically identical daughter cells of roughly equal size.

More questions in this quiz

Answers and explanations are in the full quiz.

1. Syngamy, the fusion of gametes, typically occurs in which phase of sexual reproduction?
2. What is the primary function of endosperm in angiosperms?
3. Which term describes the production of new individuals from vegetative parts of the parent plant, such as roots, stems, and leaves?
4. What is the significance of cross-pollination in plants?
5. In yeast, reproduction primarily occurs through:
6. Which of the following is an example of an animal that exhibits external fertilization?
7. Which structure in flowering plants is responsible for producing pollen grains?
8. The development of a seed from an ovule after fertilization is a post-fertilization event. Which part of the ovule develops into the seed coat?
9. Which type of asexual reproduction involves the formation of a new organism from an outgrowth or bud that detaches from the parent body?
10. In sexual reproduction, the diploid zygote undergoes mitotic divisions to form the embryo. This process is known as:
11. Which of the following is NOT a method of vegetative propagation?
12. The transfer of pollen grains from the anther to the stigma is called:
13. What is the function of the male gamete in sexual reproduction?
14. The fusion of male and female gametes is called syngamy. When this fusion occurs outside the body of the organism, it is termed:
15. Which part of the pistil receives the pollen grains during pollination?
16. What is the essential requirement for sexual reproduction?
17. Which of the following is a characteristic of asexual reproduction that leads to genetic uniformity in offspring?
18. The structure formed after the fusion of sperm and ovum is called:
19. What is the primary function of petals in a flower?
20. What is the term for the development of a female gamete (ovum) from a primary oocyte?
21. In an annual plant that reproduces sexually, the production of seeds is typically followed by:
22. Which method of asexual reproduction is observed in Hydra?
23. What is the biological significance of producing numerous gametes during sexual reproduction?
24. Which of the following is a disadvantage of sexual reproduction compared to asexual reproduction?
25. What role does the endosperm play in seeds of monocots like wheat?
26. Which term describes the ability of an organism to produce offspring?
27. The process of formation of male gametes is called spermatogenesis. In which part of the testis does this occur?
28. Which of the following is a disadvantage of asexual reproduction in terms of evolutionary adaptation?
29. The process where a male gamete fuses with the egg cell is known as:
30. Which of the following is an example of sexual reproduction in plants that involves the fusion of male and female gametes?

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