Class 12 Biology MCQ Chapter 1 Reproduction in Organisms
Kick-start your Biology exam preparation with our Class 12 Biology MCQ Chapter 1 Reproduction in Organisms English Medium collection. This article provides a carefully selected set of multiple-choice questions (MCQs) with answers, specially designed for AHSEC Higher Secondary students who want to strengthen their understanding of fundamental biological concepts.
The chapter Reproduction in Organisms introduces students to the importance of reproduction as a characteristic feature of living organisms. It covers essential topics such as lifespan, reproductive phases, asexual reproduction, sexual reproduction, vegetative propagation, and the significance of reproduction in maintaining the continuity of species. These concepts form the foundation for advanced chapters related to human and plant reproduction.
All MCQs are prepared according to the latest AHSEC syllabus and examination pattern, making them highly useful for revision, self-assessment, and board exam preparation. Regular practice of these objective questions will help students improve conceptual clarity, enhance memory retention, and gain confidence in answering Biology questions accurately.
Whether you are preparing for class tests, model examinations, or the AHSEC Higher Secondary Final Examination, these Chapter 1 MCQ solutions will serve as a valuable study resource for achieving better results in Biology.
Unit VI: Reproduction
Reproduction in Organisms
VSA & MCQ
I. Very Short Question-Answers
Q. What is reproduction?
Ans: Reproduction is the biological process by which organisms produce young ones similar to themselves.
Q. Why is reproduction important for living organisms?
Ans: Reproduction ensures continuity of species from generation to generation.
Q. What is the lifespan of an organism?
Ans: Lifespan is the period from birth to natural death of an organism.
Q. Name the phase in which an organism grows and becomes mature.
Ans: The phase is called the juvenile phase.
Q. What is the reproductive phase in flowering plants marked by?
Ans: It is marked by the appearance of flowers.
Q. What is senescence?
Ans: Senescence is the period of gradual ageing in organisms.
Q. Define asexual reproduction.
Ans: Asexual reproduction is the production of offspring from a single parent without fusion of gametes.
Q. Name the type of reproduction in Amoeba.
Ans: Binary fission.
Q. What is binary fission?
Ans: Binary fission is a type of asexual reproduction in which one organism divides into two daughter organisms.
Q. Name the reproductive structure in Hydra responsible for asexual reproduction.
Ans: Bud.
Q. What is budding?
Ans: Budding is a method of asexual reproduction in which a new individual develops from a bud on the parent body.
Q. Give one example of an organism reproducing by spores.
Ans: Rhizopus.
Q. What are zoospores?
Ans: Zoospores are motile asexual spores produced by some algae and fungi.
Q. Name the method of reproduction in yeast.
Ans: Budding.
Q. What is vegetative propagation?
Ans: Vegetative propagation is a form of asexual reproduction in plants using vegetative parts like root, stem, or leaf.
Q. Name one plant propagated by stem cutting.
Ans: Rose.
Q. Name one plant propagated by leaves.
Ans: Bryophyllum.
Q. What is tissue culture?
Ans: Tissue culture is the technique of growing plant cells or tissues in an artificial nutrient medium.
Q. Define clone.
Ans: A clone is a group of genetically identical individuals produced by asexual reproduction.
Q. What is sexual reproduction?
Ans: Sexual reproduction is the process involving fusion of male and female gametes.
Q. What are gametes?
Ans: Gametes are reproductive cells involved in sexual reproduction.
Q. What is fertilization?
Ans: Fertilization is the fusion of male and female gametes.
Q. What is external fertilization?
Ans: External fertilization occurs outside the body of the organism.
Q. Name one organism showing external fertilization.
Ans: Frog.
Q. What is internal fertilization?
Ans: Internal fertilization occurs inside the body of the female organism.
Q. Name one viviparous animal.
Ans: Human being.
Q. What are oviparous animals?
Ans: Oviparous animals lay eggs outside the body.
Q. What is parthenogenesis?
Ans: Parthenogenesis is the development of an organism from an unfertilized egg.
Q. Name one organism showing parthenogenesis.
Ans: Honeybee.
Q. What is pollen grain?
Ans: Pollen grain is the male gametophyte of flowering plants.
II. Multiple Choice Questions (MCQs)
Q. The process that ensures continuity of species is:
(a) Respiration
(b) Digestion
(c) Reproduction
(d) Excretion
Ans: (c) Reproduction
Q. The reproductive phase in flowering plants begins with:
(a) Seed formation
(b) Root growth
(c) Flowering
(d) Fruit ripening
Ans: (c) Flowering
Q. Binary fission occurs in:
(a) Hydra
(b) Amoeba
(c) Planaria
(d) Spirogyra
Ans: (b) Amoeba
Q. Budding is commonly seen in:
(a) Amoeba
(b) Hydra
(c) Paramecium
(d) Plasmodium
Ans: (b) Hydra
Q. Zoospores are produced by:
(a) Rose
(b) Hydra
(c) Rhizopus
(d) Chlamydomonas
Ans: (d) Chlamydomonas
Q. Vegetative propagation through leaves occurs in:
(a) Potato
(b) Ginger
(c) Bryophyllum
(d) Onion
Ans: (c) Bryophyllum
Q. Tissue culture is also called:
(a) Hydroponics
(b) Micropropagation
(c) Layering
(d) Grafting
Ans: (b) Micropropagation
Q. A group of genetically identical organisms is called:
(a) Species
(b) Hybrid
(c) Clone
(d) Variety
Ans: (c) Clone
Q. Fusion of gametes is called:
(a) Pollination
(b) Germination
(c) Fertilization
(d) Fragmentation
Ans: (c) Fertilization
Q. External fertilization occurs in:
(a) Dog
(b) Frog
(c) Human
(d) Cow
Ans: (b) Frog
Q. Internal fertilization occurs in:
(a) Fish
(b) Frog
(c) Reptiles
(d) Starfish
Ans: (c) Reptiles
Q. Animals that lay eggs are called:
(a) Viviparous
(b) Oviparous
(c) Ovoviviparous
(d) Asexual
Ans: (b) Oviparous
Q. Development from an unfertilized egg is called:
(a) Budding
(b) Regeneration
(c) Parthenogenesis
(d) Fragmentation
Ans: (c) Parthenogenesis
Q. The male gametophyte in angiosperms is:
(a) Ovule
(b) Embryo sac
(c) Pollen grain
(d) Anther
Ans: (c) Pollen grain
Q. The lifespan of a crow is about:
(a) 200 years
(b) 15 years
(c) 1 day
(d) 1000 years
Ans: (b) 15 years
Q. Which one reproduces by fragmentation?
(a) Spirogyra
(b) Hydra
(c) Amoeba
(d) Yeast
Ans: (a) Spirogyra
Q. In yeast, reproduction occurs by:
(a) Binary fission
(b) Multiple fission
(c) Budding
(d) Regeneration
Ans: (c) Budding
Q. The juvenile phase is followed by:
(a) Senescence
(b) Death
(c) Reproductive phase
(d) Dormancy
Ans: (c) Reproductive phase
Q. Senescence refers to:
(a) Growth
(b) Reproduction
(c) Ageing
(d) Germination
Ans: (c) Ageing
Q. Which one is a viviparous animal?
(a) Frog
(b) Lizard
(c) Human
(d) Hen
Ans: (c) Human
Q. Rhizopus reproduces asexually by:
(a) Budding
(b) Spores
(c) Fragmentation
(d) Binary fission
Ans: (b) Spores
Q. Grafting is a method of:
(a) Sexual reproduction
(b) Vegetative propagation
(c) Fertilization
(d) Pollination
Ans: (b) Vegetative propagation
Q. Asexual reproduction generally produces:
(a) Variations
(b) Hybrids
(c) Clones
(d) Gametes
Ans: (c) Clones
Q. Which of the following is not a vegetative propagule?
(a) Rhizome
(b) Tuber
(c) Seed
(d) Bulb
Ans: (c) Seed
Q. The process of producing offspring by a single parent is:
(a) Sexual reproduction
(b) Asexual reproduction
(c) Fertilization
(d) Pollination
Ans: (b) Asexual reproduction
Q. The transfer of pollen grains from anther to stigma is called:
(a) Fertilization
(b) Pollination
(c) Germination
(d) Budding
Ans: (b) Pollination
Q. Which organism can reproduce by regeneration?
(a) Hydra
(b) Planaria
(c) Amoeba
(d) Yeast
Ans: (b) Planaria
Q. The naturally ageing stage is known as:
(a) Juvenile phase
(b) Reproductive phase
(c) Senescence
(d) Embryonic phase
Ans: (c) Senescence
Q. In honeybees, drones develop from:
(a) Fertilized eggs
(b) Unfertilized eggs
(c) Spores
(d) Buds
Ans: (b) Unfertilized eggs
Q. Which of the following is an artificial method of vegetative propagation?
(a) Runner
(b) Offset
(c) Grafting
(d) Rhizome
Ans: (c) Grafting
Q. Assertion (A): Amoeba reproduces by binary fission.
Reason (R): In binary fission, one parent divides into two daughter cells.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (b)
Q. Assertion (A): Bryophyllum reproduces vegetatively through leaves.
Reason (R): Bryophyllum produces flowers on leaf margins.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (d)
Q. Assertion (A): Sexual reproduction involves fusion of gametes.
Reason (R): Gametes are formed only in plants.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (c)
Q. Assertion (A): External fertilization occurs in frogs.
Reason (R): Fusion of gametes takes place outside the female body in frogs.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (a)
Q. Assertion (A): Tissue culture helps in rapid multiplication of plants.
Reason (R): Tissue culture is also called micropropagation.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (b)
Q. Assertion (A): Oviparous animals give birth to young ones.
Reason (R): Oviparous animals lay eggs.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (d)
Q. Assertion (A): Clones are genetically identical individuals.
Reason (R): Asexual reproduction usually produces clones.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.
Ans: (a)
