Life Processes

  • Question 9
    CBSEENSC10011709

    What are outside raw materials used for by an organism?

    Solution

    An organism needs raw materials from outside are mainly.

    (a) Food: Usually carbon based compounds to supply energy, materials like minerals, vitamins etc. for working and maintenance of cells/tissues.
    (b) Water: To provide medium in the body to live and carry out all the metabolic reactions necessary for life.
    (c) Oxygen: For respiration.

    Question 10
    CBSEENSC10011710

    What processes would you consider essential for maintaining life?

    Solution

    Processes essential for maintaining life are:
    (i) Nutrition (ii) Respiration
    (iii) Transportation (iv) Excretion.

    Question 11
    CBSEENSC10011711

    From where do you get the energy to do work from?

    Solution
    We get energy to do work from the food we eat.
    Question 12
    CBSEENSC10011712

    Name the main modes of nutrition.

    Solution
    The main modes of nutition are:
    Autotrophic and Heterotrophic.

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