St. Charles School (CBSE) Grade - 7

15 Questions | Total Attempts: 59

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St. Charles School (CBSE) Grade - 7

Biology - Nutrition in plants


Questions and Answers
  • 1. 
    1. Difference between Autotrophs and Heterotrophs
  • 2. 
    2. Explain the term : Photosynthesis with an example
  • 3. 
    3. Wheat dough if left in the open, after a few days, starts to emit a foul smell and becomes unfit for use. Give reason.
  • 4. 
    4. Explain : Insectivorous plants
  • 5. 
    Insectivorous plant among the following is  
    • A. 

      (a) lichen

    • B. 

      (b) Cuscuta

    • C. 

      (c) pitcher plant

    • D. 

      (d) bread mould

  • 6. 
    In the plant of cactus leaves are modified into  
    • A. 

       spines

    • B. 

       leaf vein

    • C. 

       pitcher

    • D. 

      Branches  

  • 7. 
    7. If iodine is dropped on the boiled leaf it gives blue-black colour due to the presence of  
    • A. 

      Protein  

    • B. 

      Fat

    • C. 

      Starch

    • D. 

      Vitamin

  • 8. 
    8. In the process of photosynthesis, plants  
    • A. 

      Take O2 and release CO2

    • B. 

      Take CO2 and release O2  

    • C. 

      Take and release O2  

    • D. 

      Take O2 and release water  

  • 9. 
    Food is necessary for plants only.  
    • A. 

      True

    • B. 

      False

  • 10. 
    10. Chlorophyll is present in an animal cell.  
    • A. 

      True

    • B. 

      False

  • 11. 
    Fungi are green plants that can synthesise their own food.  
    • A. 

      True

    • B. 

      False

  • 12. 
    Nitrogen is an essential nutrient for plants growth. But farmers who cultivate pulses as crops like green gram, bengal gram, black gram, etc., do not apply nitrogenous fertilisers during t cultivation. Why?
  • 13. 
    13. What are the various raw materials for photosynthesis?  
  • 14. 
    14. The ultimate source of food on earth is  
    • A. 

      Plants

    • B. 

      Sunlight

    • C. 

      Animals

    • D. 

      Proteins

  • 15. 
    15. Lichen is a saprophytic plant.  
    • A. 

      True

    • B. 

      False

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