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Reproduction in Organisms Test - 36

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Reproduction in Organisms Test - 36
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  • Question 1
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    Rhizopus reproduces by the method of:
    Solution
    Rhizopus is a genus of common saprophytic fungi. Rhizopus reproduce by forming asexual and sexual spores. In asexual reproduction, spores are produced inside a spherical structure, the sporangium. These spores are released out by the bursting of the sporangium. In getting a suitable substratum, the spores germinate and form new individuals. In sexual reproduction, a dark zygospore is produced at the point where two compatible mycelia fuse.
    Thus, the correct answer is option B, 'Spore formation'.
  • Question 2
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    Natural parthenogenesis is found in
    Solution
    Parthenogenesis can be defined as the development of an egg into an embryo without fertilization. In honey bee, among some arthropods like hymenopterans (ants, bees and wasps), haploid males are produced parthenogenetically from unfertilized eggs.
  • Question 3
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    In which of the following plants vegetative reproduction takes place with the help of bulbils?
    Solution
     Agave can sexually reproduce by seeds and vegetatively by aerial bulbils and ground level based shoots and rhizomes. The Colocasia reproduces sexually by seeds and vegetatively by corms, tubers and root suckers. Zingiber reproduces vegetatively by aromatic articulated rhizomes. Vallisneria reproduces vegetatively through runners. So, the correct answer is option C.
  • Question 4
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    Natural parthenogenesis occurs in  
    Solution
    Answer: (A) Honeybee.
    Explanation:
    • The production of new offspring from the female individual without being fertilized by the male individual is termed parthenogenesis.
    • Due to this, the offspring produced are haploid in nature.
    • The offspring produced by the female honeybee are called drones and they are haploid in nature.
    Hence, natural parthenogenesis occurs in honeybees.

  • Question 5
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    Fusion between gametes of unequal sizes is called as
    Solution
    There are different forms of reproduction which differs on the basis of the type of fusion and the gametes which are involved. Anisogamy refers to the fertilization process in which there are two gametes which are of different sizes. Oogamy is the process which refers to the fusion of the gametes during fertilization. Isogamy refers to gametes which are similar to each other.
    Thus, the correct answer is option C. 
  • Question 6
    1 / -0
    Budding is the common method of asexual reproduction seen in
    Solution
    Budding is the common method of asexual reproduction in which cell division occurs at a particular site and an outgrowth is formed called as bud which leads to a new organism and detached from parent as they get matured. It is commonly exhibited by Hydra and Yeast.
    So, the correct answer is option B.
  • Question 7
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    Pollination is best defined as?
    Solution
    Pollination can be best defined as the transfer of pollen from the male anther of a flower to the female stigma to produce new offspring. It is carried out by various means like birds, water, wind etc. It helps in fertilization and also creates variation.

  • Question 8
    1 / -0
    In which of the following plants vegetative reproduction takes place with the help of bulbils? 
    Solution
    Bulbils are a small bulb-like structure which may be removed to form a new plant. Agave can sexually reproduce by seeds and vegetatively by aerial bulbils and ground level based shoots and rhizomes. Colocasia reproduces sexually by seeds and vegetatively by corms, tubers and root suckers. Zingiber reproduces vegetatively by aromatic articulated rhizomes. Vallisneria reproduces vegetatively through runners.
    So, the correct answer is option C.
  • Question 9
    1 / -0
    Monoestrous animals have  
    Solution
    Animals species of non-primates vertebrates are categorized into various oestrous cycle which refers to the main reproductive cycle. Monestrous animals have one reproductive cycle per year. For examples, dogs, wolves, foxes and bears. During this period the females are receptive towards the males.
    So, the correct answer is option B.
  • Question 10
    1 / -0
    The method of reproduction in Honey bee is
    Solution
    • Queen honey bee produces eggs which after fertilisation with sperm (received from drone i.e. male Honeybee) results in female Honey bee as offspring. This is an example of sexual reproduction.
    • While males develop from an unfertilised egg, which is an example of parthenogenesis.
    • It is important to note that, male honeybees are haploid while females are diploid.
    • So, the correct option is 'Both A and C'.
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