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Reproduction in Organisms Test - 28

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Reproduction in Organisms Test - 28
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  • Question 1
    1 / -0
    In the figure of budding in yeast given structure, A, B, C and D should be labeled
    respectively as

  • Question 2
    1 / -0
    In the following diagram binary fission in amoeba is illustrated but the different stages
    of the process are not in proper sequence.
    The correct sequence of fission process is

    Solution
    • This is a type of asexual reproduction in which two daughter cells (or two individuals) are formed from a single parent.
    • Parent cell becomes elongated.
    • Nucleus divides first and then the cytoplasm divides.
    • At the point of fission, constriction appears and deepens to divide the cell into two daughter cells.
    • Finally, two daughter amoeba are formed.

    So the correct answer is option A.
  • Question 3
    1 / -0
    Upon observing the slides showing stages of reproduction in Yeast and Amoeba .The correct observation are that of student(s)
    students, I, II, III and IV, reported their observations as given below :
    I.  Cytokinesis was seen in the Yeast cell.
    II.  A chain of buds was seen due to reproduction in Amoeba.
    III.  Elongated nucleus was dividing to form two daughter nuclei in Amoeba.
    IV.  Single cells of Amoeba and yeast were undergoing binary fission and budding respectively.

  • Question 4
    1 / -0
    Budding is a common method of asexual reproduction in yeast and 
    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. Yeast splits via budding resulting in a 'mother' and a smaller 'daughter' cell. Hydra also undergoes budding. In Hydra, a bud develops as an outgrowth due to repeated cell division at one specific site.
    The correct answer is option C.
  • Question 5
    1 / -0
    ....................... is a common method of multiplication of Yeast and Hydra.
    Solution
    Budding is a form of asexual reproduction in which a new organism develop from an outgrowth or bud due to cell division at one particular site.
    In Hydra, a bud develops as outgrowth due to repeated cell division at a particular site. Yeast also splits via budding and it results in a 'mother' and a smaller 'daughter' cell.
    Thus, the correct answer is option (A), 'Budding'.
  • Question 6
    1 / -0
    The shape of yeast cell is
    Solution
    The shapes of yeast cells may be spherical, globose, ellipsoidal, elongate to cylindrical with rounded ends.
    Option "D" is correct.
  • Question 7
    1 / -0
    The table given below shows a list of organisms
    and the methods of reproduction.  What do W, X, Y and Z represent?
     Organism Method of reproduction
     FernW 
     Amoeba X
     FlatwormY 
     Yeast Z
    Solution
    • Fern are Pteridophytes that show alternation of generation. They reproduce by means of spores and gametes formed during the fern life cycle.
    • Amoeba reproduces by the asexual method through binary fission in which the parent cell divides to form two daughter cells.
    • Flatworms such as Planaria when cut into pieces, each piece regenerates into a complete organism.
    • Yeast reproduces by budding in which a small outgrowth called bud forms on the parent cell that later on separate to form an independent organism.
    Thus the correct answer is option  D.
  • Question 8
    1 / -0
    In many invertebrate organisms, both sexes are found in the same individual. This is called as
    Solution
    A hermaphrodite is an organism which consists both male and female sexes in the same individual.
    Pleiotropy occurs when one gene influences multiple, unrelated phenotypic traits.
    Incomplete dominance and codominance are different forms of inheritance.
    Codominance is a form of dominance where the allele of the heterozygous pair is fully expressed.
    Thus, the correct answer is option A.
  • Question 9
    1 / -0
    The migration of pollen grains to stigma is called as____________.
    Solution
    Pollination is the process by which pollen is transferred from the anther or the male part to the stigma or the female part of the plant thereby enabling fertilization and reproduction. Fertilization is the fusion of male and female gametes. Reproduction is the biological process by which an individual organism is produced from their parents.
    Thus, the correct answer is option (B), 'Pollination'.
  • Question 10
    1 / -0
    Vegetative propagation by ........... occurs in sweet potato.
    Solution
    The vegetative propagation of sweet potato can be done by roots. Sweet potato is a modification of adventitious roots which grow from the nodes of a running stem and they are irregularly swollen due to storage of food. They can give rise to adventitious buds which when detached can give rise to new plants thus performing the function of vegetative propagation.

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