Class 12 Reproduction in Organisms MCQs with Answer

Class 12 Biology Reproduction in Organisms MCQs. Reproduction is defined as a biological process in which an organism gives rise to young ones (offspring) similar to itself. The offspring grow, mature and in turn produce new offspring. Thus, there is a cycle of birth, growth, and death. Reproduction is a biological process wherein younger ones produced are identical to their parents. This phenomenon is significant in the continuity of the species, generation after generation.

Class 12 Biology Reproduction in Organisms MCQs with Answer

Q1. Gemmules are also known as:

1. Morula.
2. External buds.
3. Mulberry.
4. Internal buds.

Q2. The number of chromosomes in the shoot tip cells of a maize plant is 20. The number of chromosomes in the
microspore mother cells of the same plant shall be:

1. 20.
2. 10.
3. 40.
4. 15.

Q3. Amoeba and Yeast reproduce asexually by fission and budding respectively, because they are:

1. Microscopic organisms.
2. Heterotrophic organisms.
3. Unicellular organisms.
4. Uninucleate organisms.

Q4. The most significant feature of vegetative propagation is that:

1. It is a method of producing a large number of individuals genetically identical to the parent.
2. It is a method of producing a large number of individuals genetically different from the parent.
3. It ensures that the progeny individuals are resistant to diseases and pests.
4. It is an age old practice.

Q5. A few statements with regard to sexual reproduction are given below:

1. Sexual reproduction does not always require two individuals.
2. Sexual reproduction generally involves gametic fusion.
3. Meiosis never occurs during sexual reproduction.
4. External fertilisation is a rule during sexual reproduction

Choose the correct statements from the options below:

1. i and iv.
2. i and ii.
3. ii and iii.
4. i and iv.

Q6. Which of the following situations correctly describe the similarity between an angiosperm egg and a human egg?

1. Eggs of both are formed only once in a lifetime.
2. Both the angiosperm egg and human egg are stationary.
3. Both the angiosperm egg and human egg are motile transported.
4. Syngamy in both results in the formation of zygote.

Choose the correct answer from the options given below:

1. ii and iv.
2. iv only.
3. iii and iv.
4. i and iv

Q7. There is no natural death in single celled organisms like Amoeba and bacteria because:

1. They cannot reproduce sexually.
2. They reproduce by binary fission.
3. Parental body is distributed among the offspring.
4. They are microscopic.

Q8. A few statements describing certain features of reproduction are given below:

1. Gametic fusion takes place.
2. Transfer of genetic material takes place.
3. Reduction division takes place.
4. Progeny have some resemblance with parents.

Select the options that are true for both asexual and sexual reproduction from the options given below:

1. i and ii.
2. ii and iii.
3. ii and iv.
4. i and iii.

Q9. Sugarcane is propagated by:

1. Stem cutting.
2. Leaf buds.
3. Root cutting.
4. Seeds.

Q10. Choose the correct statement from amongst the following:

1. Dioecious (hermaphrodite) organisms are seen only in animals.
2. Dioecious organisms are seen only in plants.
3. Dioecious organisms are seen in both plants and animals.
4. Dioecious organisms are seen only in vertebrates.

Q11. A multicellular, filamentous alga exhibits a type of sexual life cycle in which the meiotic division occurs after the
formation of zygote. The adult filament of this alga has:

1. haploid vegetative cells and diploid gametangia.
2. diploid vegetative cells and diploid gametangia.
3. diploid vegetative cells and haploid gametangia.
4. haploid vegetative cells and haploid gametangia.

Q12. Offspring formed by sexual reproduction exhibit more variation than those formed by Asexual reproduction
because:

1. Sexual reproduction is a lengthy process.
2. Gametes of parents have qualitatively different genetic composition.
3. Genetic material comes from parents of two different species.
4. Greater amount of DNA is involved in sexual reproduction.

Q13. In animals, juvenile phase is followed by:

1. Reproductive phase.
2. Senescent phase.
3. Old age.
4. Vegetative phase.

Q14. In amphibians, syngamy occurs in:

1. Outside the body.
2. Inside the body.
3. In oviduct.
4. In Uterus.

Q15. Pick out the monoecious plant from the following

1. Coccinia.
2. Mulberry.
3. Cucumber.
4. Date palm.

Q16. Given below are a few statements related to external fertilization. Choose the correct statements:

1. The male and female gametes are formed and released simultaneously.
2. Only a few gametes are released into the medium.
3. Water is the medium in a majority of organisms exhibiting external fertilization.
4. Offspring formed as a result of external fertilization have better.

Chance of survival than those formed inside an organism,

1. iii and iv.
2. i and iii.
3. ii and iv.

Q17. Identify the incorrect statement:

1. In asexual reproduction, the offspring produced are morphologically and genetically identical to the parent.
2. Zoospores are sexual reproductive structures.
3. In asexual reproduction, a single parent produces offspring with or without the formation of gametes.
4. Conidia are asexual structures in Penicillium.

Q18. There are various types of reproduction. The type of reproduction adopted by an organism depends on:

1. The habitat and morphology of the organism.
2. Morphology of the organism.
3. Morphology and physiology of the organism.
4. The organism’s habitat, physiology and genetic makeup.

Q19. Identify the correct sequence of events:

1. Gametogenesis → Syngamy → Embryogenesis → Zygote.
2. Gametogenesis → Zygote → Syngamy → Embryogenesis.
3. Gametogenesis → Embryogenesis Zygote → Syngamy.
4. Gametogenesis → Syngamy → Zygote → Embryogenesis.

Q20. An example of a dioecious plant is

1. Cucumber.
2. Maiz.
3. Castor beans.
4. Date palm.

Q21. The statements given below describe certain features that are observed in the pistil of flowers:

1. Pistil may have many carpels.
2. Each carpel may have more than one ovule.
3. Each carpel has only one ovule.
4. Pistil have only one carpel.

Choose the statements that are true from the options below,

1. i and ii.
2. i and iii.
3. ii and iv.
4. iii and iv