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.

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
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   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
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   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.

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