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. 

Comments

Post a Comment

Popular posts from this blog

Fibre to Fabric NCERT CBSE CLASS 7 Science Online Test/Quiz

Fibre to Fabric  NCERT CBSE Class 7 Online Test/Quiz for Fibre to Fabric  Online test for "fibre to fabric" consists of ten questions, all having four alternatives. You have to choose the correct option. After attempting all questions, enter your name, class, roll no and email id. Email id is asked because through that results will be share to you.  And at last don't forget to submit your answers. After submission you can see your results too.  Enjoy taking test.  Topic- Fibre to Fabric NCERT CBSE Science Class 7 Loading…
Read more

Light NCERT Science Class 8 Summary Note

Image
What Makes Things Visible   When light from an object enters our eyes, then we see the object.  The light may have been emitted or reflected by the object.  Mirror   Highly polished surface is called mirror.  Reflection Bending back of light ray after falling on a surface, is called reflection.  Incident ray The light ray which strikes any surface, is called incident ray.  Reflected ray  The ray that comes back from the surface after reflection, is called as reflected ray.  Normal Line perpendicular to surface at point of incidence of light ray, is called normal.  Angle of incidence The angle between normal and incident ray, is called angle of incidence.  Angle of reflection The angle between normal and reflected ray, is called angle of reflection.  Laws of reflection (i) The incident ray, the normal at the point of incidence and the reflected ray, all lie in the same plane.  (ii) The angle of incidence is always equal to the angle of reflection.  Nature of Images formed by Plane Mirro
Read more

Chemical Effects of Electric Current NCERT Summary Class VIII Science Chapter 14

Image
Good Conductor The substance through which electricity can pass is called good conductor.  Examples - Copper, Aluminum Poor conductor The substance through which electricity can not pass is called poor conductor. Examples - Rubber, plastic etc.  Tester A device that test conductance of a substance, is called tester.  Solutions of acids, bases and salts are generally good conductor.  Chemical effects of Current Chemical reactions (effects) caused when electricity passes through a conducting liquid, is chemical effects of current.  How to recognize chemical reaction - Release of gas - Change of colour of solution - Release of heat - Formation of new substance In battery No. of terminals- 2 (positive and negative)  Positive terminal is also called Anode .  Negative terminal is also called cathode .  Solution  is called electrolyte .  Passing current through a solution What happens when electricity is passed through c
Read more