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The Fundamental Unit of Life Test - 37

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The Fundamental Unit of Life Test - 37
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  • Question 1
    1 / -0
    Why does cell division occur?
    Solution
    New cells are formed in organisms in order to grow, to replace old, dead and injured cells, and to form gametes required for reproduction. The process by which new cells are made is called cell division.
    Hence the correct option is E.
  • Question 2
    1 / -0
    The number of daughter cells formed after meiosis is
    Solution
    Specific cells of reproductive organs or tissues in animals and plants divide to form gametes, which after fertilisation give rise to offspring. They divide by a different process called meiosis which involves two consecutive divisions. When a cell divides by meiosis it produces four new cells instead of just two. The new cells only have half the number of chromosomes than that of the mother cells.
    Hence the correct option is C.
  • Question 3
    1 / -0
    The type of cell division that is essential for reproduction is _______.
    Solution
    Specific cells of reproductive organs or tissues in animals and plants divide to form gametes, which after fertilisation give rise to offspring. They divide by a different process called meiosis which involves two consecutive divisions. When a cell divides by meiosis it produces four new cells instead of just two. The new cells only have half the number of chromosomes than that of the mother cells.
    Hence the correct option is B.
  • Question 4
    1 / -0
    If the mother cell cell has 24 chromosomes, the 2 daughter cells formed after mitosis will have ______ chromosomes.
    Solution
    The process of cell division by which most of the cells divide for growth is called mitosis. In this process, each cell called mother cell divides to form two identical daughter cells. The daughter cells have the same number of chromosomes as mother cell.
    Hence the correct option is B.
  • Question 5
    1 / -0
    Why does a cell divide?
    Solution
    New cells are formed in organisms in order to grow, replace old, dead, and injured cells, and form gametes required for reproduction. The process by which new cells are made is called cell division.
    Hence, the correct option is E.
  • Question 6
    1 / -0
    Which of the following is not true about meiosis?
    Solution
    Specific cells of reproductive organs or tissues in animals and plants divide to form gametes, which after fertilisation give rise to offspring. They divide by a different process called meiosis which involves two consecutive divisions. When a cell divides by meiosis it produces four new cells instead of just two. The new cells only have half the number of chromosomes than that of the mother cells.
    Hence the correct option is C.
  • Question 7
    1 / -0
    Which of the following is true about mitosis?
    Solution
    The process of cell division by which most of the cells divide for growth is called mitosis. In this process, each cell called the mother cell divides to form two identical daughter cells. The daughter cells have the same number of chromosomes as the mother cell. It helps in the growth and repair of tissues in organisms.
    Hence,  all the statements are true and the correct option is D.
  • Question 8
    1 / -0
    The cell division that takes place for the purpose of growth is
    Solution
    During the mitosis process, the cell’s nucleus along with the chromosome is divided to form two new daughter cell nuclei. The daughter nuclei inherit the same number of chromosomes as that of the parent nucleus. Mitosis is the type of division that leads to growth. 
    Thus the correct answer is option A. 
  • Question 9
    1 / -0
    Onion cell has no cell wall. This statement is ______.
    Solution
    • The onion cell is a plant cell, it has a cell wall with a small nucleus and regular cytoplasm.
    • The cellulose present in the cell walls forms a rectangular brick-like structure.
    Thus, the given statement is false, i.e., option B is correct.
  • Question 10
    1 / -0
    Identifying feature(s) of onion cell under microscope are___________.
    Solution
    • Onion cell is a plant cell. Plants cells have a cell wall, large vacuole, and a peripheral nucleus. The primary cell wall is made up of cellulose, the large vacuole stores water, nutrients, and waste materials, and a nucleus that is pushed towards the edge.

    Thus, option D is correct.
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