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Reproduction in Organisms Test - 35

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Reproduction in Organisms Test - 35
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  • Question 1
    1 / -0
    Which type of reproduction is most common in hydra?
    Solution
    Organisms such as Hydra use regenerative cells for reproduction in the process of budding. In Hydra, a bud develops as an outgrowth due to repeated cell division at one specific site.
    In Hydra, budding occurs as:
    • A bud begins to form on the tubular body of an adult Hydra.
    • The bud develops a mouth and tentacles
    • The bud detaches from its parent
    • The new Hydra is fully developed and will find its own location for attachment.
    Thus, the correct answer is option (A), 'Budding'.
  • Question 2
    1 / -0
    Which one of the following is concerned with asexual reproduction?
    Solution
    Spore is a reproductive cell capable of developing into a new individual without fusion with another reproductive cell in a favorable condition. As there is no involvement of fusion of gamete or reproductive cell for the formation new individual is called as asexual reproduction.
    Zygote is a diploid cell formed by the fusion of male and female gametes. Gonads are organs that produce gametes.
    Thus, the correct answer is option B.
  • Question 3
    1 / -0
    ............ develops into embryo.
    Solution
    • A zygote is formed by fertilization of egg and sperm (gametes) and further cell division leads to the development of an embryo. 
    • A micropyle is a small opening in the ovule through which the pollen tube penetrates.
    • Chalaza is the basal part of a plant ovule where the nucellus is fused to the surrounding integument and to which the funiculus is usually attached.
    • Pollen grains are male gametes produced in the anthers.

    So, the correct answer is 'Zygote'.
  • Question 4
    1 / -0
    In vegetative reproduction ............ are involved.
    Solution
    Spores are agents of asexual reproduction or vegetative reproduction, whereas pistils and stamens are part of sexual reproductive organs of plants that produce gametes. Gamete are agents of sexual reproduction.
    Spores are produced by bacteria, fungi, algae, and plants.
    Spore are vegetative reproductive cell because they are capable of developing into a new individual without fusion with another reproductive cell
    hence answer is 'spores'.
  • Question 5
    1 / -0
    The development of embryo inside an egg is called as:
    Solution
    Vivipary is the development of the embryo inside the body of the mother, eventually leading to live birth.
    Carnivorous are animals that feed on animal flesh.
    Omnivorous are animals that feed on both plants and animals.
    Ovipary is the method of reproduction in which eggs are laid and embryos develop outside the mother's body, each egg eventually hatching into a young animal.
    So, the correct answer is option D.
  • Question 6
    1 / -0
    Why animals like frog and fish produce hundreds of eggs while hens and humans produce one egg at a time?
    Solution
    Eggs of frogs and fish are preyed by predators and are exposed to environment. External fertilization takes place in frogs and fish and thus the challenges are more. Whereas in the case of humans, internal fertilization takes place and thus only one egg is produced, where there are no predator attacks.
    So, the correct answer is 'Eggs of frogs and fish are preyed by predators and are exposed to environment.'
  • Question 7
    1 / -0
    When the offsprings are produced without fertilisation of ova it is called as _______
    Solution
    Parthenogenesis is a kind of a sexual reproduction 
    in which the female gamete develops in embargo 
    without being fertilized by male gamete.
    It also occurs in animals, insects, bees etc.
    for example -
    dandelion & hawk weeds.

  • Question 8
    1 / -0
    In which animal parthenogenesis is common?
    Solution
    Parthenogenesis (virgin development) is a form of asexual reproduction in which an unfertilized egg develops into an adult animal. The adult is typically haploid. Parthenogenesis is common among insects (especially honeybees and wasps, aphids etc.) and crustaceans; it also occurs among some other invertebrate and vertebrate groups, including some species of nematodes, gastropods, fishes, amphibians, and reptiles. Although a few species appear to reproduce solely by parthenogenesis, in most species episodes of parthenogenesis alternate with periods of sexual reproduction. Parthenogenesis may occur for several generations, followed at some point by sexual reproduction in which males develop, produce sperm and mate with the females to fertilize their eggs. In some species, parthenogenesis is a means of rapidly producing individuals when conditions are favorable.
    Therefore, the correct answer is option C.
  • Question 9
    1 / -0
    Which of the following animals are correctly categorized?
    OviparousViviparous
    A. Human, CowSnake, Pigeon
    B. Hen, SnakeHuman, Crocodile
    C. Pigeon, Crocodile Rat, Horse
    D. Toad, EarthwormCockroach, Cat
    Solution
    • Oviparous are the animals that lay eggs and embryonic development majorly takes place outside the body of the mother. For e.g. - pigeon and crocodile etc.
    • Viviparous are the animals that give birth to live young ones that have developed inside the body of the female parent, for e.g. - rats and horses etc.
    • In option A, humans and cows are viviparous while snakes and pigeons are oviparous.
    • In option B, crocodile is oviparous.
    • In option C, cockroaches are oviparous.

    So, the correct answer is option C.
  • Question 10
    1 / -0
    An organism which can reproduce by budding as well as regeneration is 
    Solution
    Budding is a form of asexual reproduction in which a new organism develops from an outgrowth or bud due to cell division at one particular site. Organisms such as Hydra use regenerative cells for reproduction in the process of budding. In Hydra, a bud develops as an outgrowth due to repeated cell division at one specific site. These buds develop into tiny individuals and when fully mature, detach from the parent body and become new independent individuals.
    Also, Hydra undergoes morphallaxis i.e., tissue regeneration when injured or severed.
    Thus, the correct answer is option (C), 'Hydra'
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