Reproduction - Reproduction in Organisms
Q. In plants, which structure is primarily responsible for asexual reproduction? (2023)
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A.
Roots
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B.
Leaves
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C.
Stems
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D.
Flowers
Solution
Stems, particularly in the form of runners or tubers, are primarily responsible for asexual reproduction in many plants.
Correct Answer: C — Stems
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Q. In plants, which structure is responsible for sexual reproduction? (2021)
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A.
Roots
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B.
Leaves
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C.
Flowers
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D.
Stems
Solution
Flowers are the reproductive structures in plants that facilitate sexual reproduction.
Correct Answer: C — Flowers
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Q. In which of the following does external fertilization occur? (2019)
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A.
Frogs
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B.
Humans
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C.
Birds
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D.
Reptiles
Solution
Frogs typically exhibit external fertilization, where eggs and sperm are released into the water.
Correct Answer: A — Frogs
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Q. In which of the following organisms does binary fission occur? (2019)
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A.
Yeast
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B.
Amoeba
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C.
Hydra
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D.
Starfish
Solution
Binary fission is a form of asexual reproduction commonly seen in unicellular organisms like Amoeba.
Correct Answer: B — Amoeba
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Q. In which of the following organisms does external fertilization occur? (2021)
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A.
Frog
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B.
Human
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C.
Dog
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D.
Cat
Solution
Frogs exhibit external fertilization where eggs and sperm are released into the water.
Correct Answer: A — Frog
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Q. In which type of reproduction does fertilization occur? (2022)
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A.
Asexual reproduction
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B.
Binary fission
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C.
Sexual reproduction
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D.
Budding
Solution
Fertilization occurs in sexual reproduction, where male and female gametes fuse to form a zygote.
Correct Answer: C — Sexual reproduction
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Q. In which type of reproduction does regeneration occur? (2020)
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A.
Asexual reproduction
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B.
Sexual reproduction
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C.
Both asexual and sexual reproduction
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D.
None of the above
Solution
Regeneration is a form of asexual reproduction where an organism can regrow lost parts.
Correct Answer: A — Asexual reproduction
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Q. What is the main advantage of sexual reproduction? (2023)
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A.
Faster reproduction
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B.
Genetic variation
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C.
Less energy required
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D.
No need for a mate
Solution
Sexual reproduction promotes genetic variation, which is beneficial for adaptation and evolution.
Correct Answer: B — Genetic variation
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Q. What is the main disadvantage of asexual reproduction? (2022)
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A.
Slower reproduction rate
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B.
Lack of genetic variation
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C.
Requires more energy
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D.
Involves two parents
Solution
The main disadvantage of asexual reproduction is the lack of genetic variation, which can make populations vulnerable to diseases.
Correct Answer: B — Lack of genetic variation
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Q. What is the main purpose of reproduction in organisms? (2020)
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A.
To maintain homeostasis
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B.
To produce energy
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C.
To ensure species survival
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D.
To grow and develop
Solution
The main purpose of reproduction is to ensure the survival of a species by producing new individuals.
Correct Answer: C — To ensure species survival
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Q. What is the primary advantage of asexual reproduction? (2022)
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A.
Genetic diversity
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B.
Rapid population increase
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C.
Requires less energy
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D.
All of the above
Solution
Asexual reproduction allows for rapid population increase as it does not require a mate.
Correct Answer: B — Rapid population increase
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Q. What is the primary advantage of sexual reproduction? (2021)
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A.
Faster reproduction
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B.
Genetic diversity
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C.
No need for a mate
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D.
Lower energy requirement
Solution
Sexual reproduction leads to genetic diversity, which can enhance survival in changing environments.
Correct Answer: B — Genetic diversity
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Q. What is the primary purpose of reproduction in organisms? (2020)
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A.
To increase genetic diversity
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B.
To maintain homeostasis
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C.
To produce energy
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D.
To ensure survival of the species
Solution
Reproduction ensures the continuation of a species by producing offspring.
Correct Answer: D — To ensure survival of the species
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Q. What is the term for the development of an organism from an egg? (2023)
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A.
Embryogenesis
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B.
Metamorphosis
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C.
Germination
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D.
Fertilization
Solution
Embryogenesis is the process of development of an organism from a fertilized egg.
Correct Answer: A — Embryogenesis
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Q. What is the term for the process of forming gametes? (2021)
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A.
Mitosis
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B.
Meiosis
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C.
Fertilization
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D.
Budding
Solution
Meiosis is the process that leads to the formation of gametes, reducing the chromosome number by half.
Correct Answer: B — Meiosis
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Q. What type of reproduction occurs in sponges? (2020)
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A.
Asexual reproduction only
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B.
Sexual reproduction only
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C.
Both asexual and sexual reproduction
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D.
None of the above
Solution
Sponges can reproduce both asexually through budding and sexually by producing gametes.
Correct Answer: C — Both asexual and sexual reproduction
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Q. Which of the following is a characteristic of asexual reproduction? (2019)
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A.
Involves two parents
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B.
Produces genetically identical offspring
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C.
Requires gametes
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D.
Occurs in higher organisms only
Solution
Asexual reproduction produces genetically identical offspring from a single parent.
Correct Answer: B — Produces genetically identical offspring
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Q. Which of the following is a disadvantage of asexual reproduction? (2022)
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A.
Requires less energy
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B.
Produces many offspring quickly
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C.
Lack of genetic variation
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D.
Can occur in isolation
Solution
Asexual reproduction lacks genetic variation, which can make populations more vulnerable to diseases and environmental changes.
Correct Answer: C — Lack of genetic variation
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Q. Which of the following is a feature of sexual reproduction? (2021)
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A.
Single parent
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B.
Genetic variation
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C.
Slow process
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D.
All of the above
Solution
Sexual reproduction involves two parents and results in genetic variation among offspring.
Correct Answer: B — Genetic variation
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Q. Which of the following is a form of vegetative propagation? (2021)
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A.
Cutting
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B.
Budding
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C.
Binary fission
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D.
Spore formation
Solution
Cutting is a method of vegetative propagation where a part of a plant is used to grow a new plant.
Correct Answer: A — Cutting
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Q. Which of the following is a method of vegetative propagation? (2023)
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A.
Cutting
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B.
Budding
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C.
Binary fission
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D.
All of the above
Solution
Cutting is a method of vegetative propagation where a part of the plant is cut and planted to grow a new plant.
Correct Answer: A — Cutting
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Q. Which of the following is an example of sexual reproduction? (2023)
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A.
Budding in hydra
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B.
Fission in amoeba
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C.
Pollination in flowering plants
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D.
Regeneration in planaria
Solution
Pollination in flowering plants is a key process in sexual reproduction, involving the transfer of pollen to fertilize ovules.
Correct Answer: C — Pollination in flowering plants
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Q. Which of the following is asexual reproduction? (2019)
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A.
Budding in hydra
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B.
Fertilization in frogs
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C.
Pollination in flowering plants
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D.
Binary fission in amoeba
Solution
Binary fission in amoeba is a form of asexual reproduction where a single organism divides into two.
Correct Answer: D — Binary fission in amoeba
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Q. Which of the following is NOT a method of asexual reproduction? (2020)
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A.
Fragmentation
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B.
Budding
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C.
Spore formation
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D.
Cross-fertilization
Solution
Cross-fertilization involves the fusion of gametes from two different individuals, hence it is not asexual.
Correct Answer: D — Cross-fertilization
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Q. Which of the following organisms can reproduce both sexually and asexually? (2023)
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A.
Fungi
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B.
Starfish
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C.
Hydra
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D.
All of the above
Solution
Many organisms, including fungi, starfish, and Hydra, can reproduce both sexually and asexually depending on environmental conditions.
Correct Answer: D — All of the above
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Q. Which of the following organisms reproduces asexually by budding? (2021)
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A.
Hydra
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B.
Frog
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C.
Human
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D.
Mango tree
Solution
Hydra reproduces asexually by the process of budding, where a new individual develops from an outgrowth of the parent.
Correct Answer: A — Hydra
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Q. Which of the following organisms reproduces by budding? (2023)
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A.
Planaria
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B.
Hydra
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C.
Bacteria
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D.
Fungi
Solution
Budding is a form of asexual reproduction seen in organisms like Hydra, where a new individual develops from an outgrowth.
Correct Answer: B — Hydra
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Q. Which of the following organisms reproduces by parthenogenesis? (2022)
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A.
Honeybee
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B.
Frog
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C.
Lizard
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D.
Human
Solution
Honeybees can reproduce by parthenogenesis, where an egg develops into an organism without fertilization.
Correct Answer: A — Honeybee
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Q. Which of the following organisms reproduces through parthenogenesis? (2020)
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A.
Honeybee
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B.
Frog
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C.
Human
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D.
Goldfish
Solution
Honeybees can reproduce through parthenogenesis, where unfertilized eggs develop into new individuals.
Correct Answer: A — Honeybee
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Q. Which type of reproduction involves the fusion of gametes? (2022)
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A.
Asexual reproduction
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B.
Vegetative propagation
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C.
Sexual reproduction
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D.
Budding
Solution
Sexual reproduction involves the fusion of male and female gametes to form a zygote.
Correct Answer: C — Sexual reproduction
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