Nutrition in Plants NCERT CBSE Class 7 Chapter 1 Summary Note

Nutrition in Plants NCERT CBSE Class 7 Chapter 1 Summary Note

                   Nutrition in Plants 

*Nutrition
    -Intake of foods and its utilisation by our   
    body. 

*Mode of nutrition
             (a)Autotrophic nutrition
             (b)Heterotrophic nutrition

*Autotrophic nutrition
    -Mode of nutrition where organism prepare 
     its food themselves. 
    -(Auto- Self, trophic- Nourishment) 

*Heterotrophic nutrition
    -Mode of nutrition where organism depend       on other for food. 
    -(Hetero- other, trophic- nourishment) 

*Photosynthesis
    - Preparation of food by green plants. 
    - Use CO2 and water. 
    - Prepare in presence of sunlight and 
      chlorophyll. 

- Carbon dioxide+Water  -------->    
                                        Carbohydrates  +  Oxygen

*Stomata
   -Tiny pores present on surface of leaf. 
   - It helps in 
                    - Transpiration (removal of water 
                       from plant through leaf) 
                    - Gas exchange

*Sun is the ultimate source of energy. 

*Chlorophyll- Green pigment. 
                         - Present in leaf. 
                         - Do photosynthesis. 

*Requirements of 
  photosynthesis                              source
  Carbon dioxide                         Atmosphere
         Water                                           Soil 
       Sunlight                                        Sun 
   Chlorophyll                                     Leaf 

*Parasite plant- 
        Plant that derive readymade food from 
        other plants. 
         - Example- Cuscutta(Amarbel) 

*Host plant- 
             Plant on which parasite climbs. 

*Insectivorous plant- 
           Insect eating plants. 
           Example- Pitcher plants 

*Saprotrophic nutrition
          Mode of nutrition, where organism take 
          in nutrients from dead and decayed  
          matter. 

*Saprotroph 
      Organism that take in nutrients from dead 
      and decayed matter. 
      Example- Fungi. 

*Lichen- 
      -Symbiotic relationship between algae
      and fungi. 
      -Fungus provide shelter, water and        
       mineral to algae. 
     -Algae provide food to fungi. 

*Nutrients replenishment in soil-
       -By adding fertilizer and manure. 
      -By crop rotation. 

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