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How do Organisms Reproduce Test - 26

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How do Organisms Reproduce Test - 26
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  • Question 1
    1 / -0
    The barriers made of rubber used by women to prevent conception are?
  • Question 2
    1 / -0
    Which of the following processes occur once a month in an adolescent girl?
    Solution
    The menstrual cycle is the reproductive cycle that takes place in females every 28 days after puberty. Ovulation is the release of the egg or the female gamete which takes place on the 14$$^{th}$$ day of the cycle. Only one egg is released every month. The process of menstruation is the bleeding phase which takes place for about 2-8 days.
    Thus, the correct answer is option D.  
  • Question 3
    1 / -0
    Which of the following hormones triggers the physical changes during adolescence?
  • Question 4
    1 / -0
    Reproduction is a .......... process of life.
    Solution
    Reproduction is the process of continuation of a species. It is a mode of production of new organisms, called offsprings, from their parents. Each organism exists due to reproduction. With every new offspring, genetic variations are passed from the parents, that help the offspring survive better in the environment. Such variations and adaptations contribute to a species sustaining life for a longer duration.
  • Question 5
    1 / -0
    Some organisms and their type of reproductions are given below. Find the correct option showing the right pairs.

    (a) Paramecium
    		(1) Spore formation
    (b) Hydra
    		(2) Budding
    (c) Mucor
    		(3) Fission
    (d) Spirogyra
    		(4) Fragmentation
    Solution
    a- 3: Paramecium reproduces by the asexual form of reproduction like fission. The organism generally performs binary fission and the parent cell divides to give two daughter cells. 
    b- 2: Hydra divides asexually by the method of budding. The bud develops and gets detached when matured. The bud can develop into an independent organism after attachment to the substratum. 
    c- 1: The mucor is included in the group of fungi that reproduce by the formation of spores. The spores germinate and then give rise to new hyphal filaments. 
    d- 4: Spirogyra is an alga that reproduces by the process of fragmentation. The filament increases in the length and then divides to form fragments. The fragments then develop to form new Spirogyra. 
    Thus, the correct answer is option D. 
  • Question 6
    1 / -0
    Seeds develop from:
    Solution

    After fertilization in plants, the ovary of the flower develops into the fruit while ovules develop into seeds. 

    So, the correct answer is B.

  • Question 7
    1 / -0
    Given diagram represents which type of reproduction?

    Solution
    A. Fragmentation is the process of breaking down of parent individual into small pieces or fragments accidentally or through external force. Each piece or fragment develops into a new individual.
    B. Binary fission is the process of division of a parent cell into two daughter cells of equal size. 
    C. Budding is the process in which the parent cell produces one or more bud-like structure which detaches from the parent cell and grows into a new individual.
    D. Sexual reproduction involves the fusion of gametes from two different parents.
    Since the given diagram is showing a bud-like structure, it represents the process of budding. So, the correct answer is option C.
  • Question 8
    1 / -0
    The transfer of pollens from anther to stigma of the same flower or different flower of the same plant is called: 
    Solution
    When a pollen grain from the stamen of a flower is transferred to the stigma of the same flower or another flower of the same plant, it is called self-pollination. It mainly occurs in bisexual flowers.
    So, the correct option is B. 
  • Question 9
    1 / -0
    Yeast reproduces by the process called:
    Solution
    Yeast reproduces by the process called budding. Budding is a type of asexual reproduction in which a small outgrowth emerges from the parent's body. On attaining maturity it detaches from the parent's body and develops into an independent individual.
    Hence, option 'D' is the correct answer. 
  • Question 10
    1 / -0
    Indentify the process of binary fission.
    Solution
    Binary fission is the process of division of parent cell into two daughter cells of equal size. During binary fission, the cell elongates and its nucleus divides into two daughter nuclei.
    Image A is showing binary fission in amoeba.
    Image B is showing budding in Hydra.
    Image C is showing regeneration in Planaria.
    So, the correct answer is option A.
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