Reproduction in Animals Quiz - CBSE Class 8 Science

Free practice quiz: Reproduction in Animals (CBSE Class 8 Science). 10 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

Sample questions

1. Which of the following is NOT a method of asexual reproduction in animals?

   1. Binary fission
   2. Budding
   3. Fragmentation
   4. Fertilization
   Show answer

   Answer: D. Fertilization

   Fertilization involves the fusion of gametes (sex cells) and is a method of sexual reproduction, not asexual reproduction. Binary fission, budding, and fragmentation are all types of asexual reproduction.

2. In which type of reproduction does the offspring inherit genetic material from only one parent?

   1. Sexual reproduction
   2. Asexual reproduction
   3. Both sexual and asexual reproduction
   4. None of the above
   Show answer

   Answer: B. Asexual reproduction

   Asexual reproduction involves only one parent, so the offspring inherits genetic material from that single parent.

3. Describe the reproductive process in a flowering plant and compare it to that of a mammal. Highlight key differences.

   1. Both involve fertilization; however, plants use pollen for fertilization while mammals use sperm. Plants produce seeds while mammals give birth to live young.
   2. Both involve asexual reproduction; plants use spores while mammals use eggs.
   3. Both involve sexual reproduction; however, plants are oviparous and mammals are viviparous.
   4. There are no similarities between the reproductive processes of plants and mammals.
   Show answer

   Answer: A. Both involve fertilization; however, plants use pollen for fertilization while mammals use sperm. Plants produce seeds while mammals give birth to live young.

   While both processes involve fertilization, the methods and outcomes differ significantly. Plants use pollen to fertilize eggs, resulting in seeds; mammals use sperm to fertilize eggs, resulting in live birth.

4. Discuss the advantages and disadvantages of sexual and asexual reproduction in animals.

   1. Sexual reproduction: Advantages - genetic variation, Disadvantages - slow process. Asexual reproduction: Advantages - fast process, Disadvantages - no genetic variation.
   2. Sexual reproduction: Advantages - fast process, Disadvantages - genetic variation. Asexual reproduction: Advantages - no genetic variation, Disadvantages - slow process.
   3. Both have the same advantages and disadvantages.
   4. Neither sexual nor asexual reproduction has any advantages or disadvantages.
   Show answer

   Answer: A. Sexual reproduction: Advantages - genetic variation, Disadvantages - slow process. Asexual reproduction: Advantages - fast process, Disadvantages - no genetic variation.

   Sexual reproduction provides genetic diversity but is slower. Asexual reproduction is fast but lacks genetic diversity, making offspring vulnerable to environmental changes.

5. Critically evaluate the different methods of contraception used to prevent pregnancy, considering their effectiveness and potential side effects.

   1. All methods of contraception are equally effective and have no side effects.
   2. Contraceptive methods vary widely in effectiveness and can have different side effects, which need to be considered before choosing a method.
   3. Only surgical methods are effective.
   4. There are no effective contraceptive methods.
   Show answer

   Answer: B. Contraceptive methods vary widely in effectiveness and can have different side effects, which need to be considered before choosing a method.

   Different contraceptive methods (e.g., pills, condoms, IUDs) have varying levels of effectiveness and potential side effects. Individuals should consult with healthcare professionals to select the most suitable method for their needs.

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