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Nutrition in Plants Test - 13

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Nutrition in Plants Test - 13
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  • Question 1
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    Insectivorous plants grow in areas deficient in
    Solution
    Insectivorous plants grow in areas deficient in nitrogen because they are able to meet the requirements of nitrogen in their body by feeding on the insects. 
    So, the correct answer is 'Nitrogen'.
  • Question 2
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    Photosynthetic autotrophs get their energy requirement from:
    Solution
    • Autotrophic nutrition is a mode of nutrition in which organism prepares their food by their own with the help of organic materials available in nature. 
    • Photosynthetic autotrophism is a mode of nutrition in which an organism prepares their food with the help of organic materials in the presence of sunlight. 
    • Plants are examples of photosynthetic autotrophs. Photosynthetic autotrophs get their requirement from light. 
    • The process by which photosyntheitic autotrophs prepare their food is known as photosynthesis. In the presence of light, with the help of carbon dioxide and water, glucose is formed.
    • Hence, the correct answer is option B. 
  • Question 3
    1 / -0
    Insectivorous plants usually survive in
    Solution
    Insectivorous plants can survive in N2N_2 deficient soil as they trap N2N_2 from the insects. The insectivorous plants secrete the sticky mucus which traps the insects. The digestive enzymes act on the proteins of the insects and break it into simpler compounds and it is assimilated by the plants in form of nitrogen.
    So, the correct answer is option B.
  • Question 4
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    Saprophytes are likely to grow on:
    Solution
    • Organisms that live and feed on dead organic materials and obtain nutrition for their growth are known as saprophytes. Example–Mucor, yeast. 
    • Saprophytes contain tubular structures known as hyphae that are responsible for producing digestive enzymes thereby breaking down complex matter into simpler ones.
    • They can grow anywhere that is warm and damp be it staled bread pieces, any other food like pickles and even in soil after rain.

    So, the correct answer is D.
  • Question 5
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    In symbiosis, Organisms share
  • Question 6
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    Choose the correct answer from the alternatives given.

    What are the products of photosynthesis
    Solution
    The main product of photosynthesis is glucose, which is the carbohydrate molecule that produces energy to run the processes of the cell. Oxygen is mainly a byproduct of the process of photosynthesis. Six molecules of carbon dioxide and six molecules of water are needed to produce one molecule of glucose.
    Thus, the correct answer is 'Oxygen and carbohydrate.'
  • Question 7
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    A symbiotic association of an alga and a fungus is termed as a: 
    Solution
    A symbiotic association between a chlorophyll-containing partner, which is an alga, and a fungus results in a composite organism called lichen. The fungus provides shelter, water, and minerals to the alga and, in return, the alga prepares and provides food to the fungus.
    Thus, the correct answer is A.

  • Question 8
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    Nitrite is oxidised to nitrate with the help of 
  • Question 9
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    How is the plant benefited by the bacteria which takes shelter in the root of the plants?
    Solution
    Nitrogen is present in abundance in the atmosphere but the plant cannot absorb atmospheric nitrogen. Plants get nitrogen from the soil. Certain types of bacteria called Rhizobium present in the soil take shelter in the root of the plants. They convert gaseous nitrogen into a usable form and release it for the plants. Plants absorb these soluble forms of nitrogen along with water and other minerals. 
    This type of nitrogen fixation is observed in plants like peas, moong, beans, and other legumes. By this process, both bacteria and plants get benefited mutually.
    So, the answer is A.
  • Question 10
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    Which one of the following conditions need not be present for photosynthesis to proceed?
    Solution
    Photosynthesis requires only CO2CO_2, light and water, and takes place in the chlorophyll of the chloroplast of leaves. Oxygen is formed in photosynthesis and is not required. 
    So, the correct option is, 'Oxygen'.
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