Chapter 1- Nutrition in Plants (Questions with Answers) - 2

• Nutrition in Plants – Questions Page

  Nutrition in Plants

   

  Question 22: 
  Where is nucleus located in a cell?

  Answer: 

  In most of the cell, nucleus is centrally located.

   

  Question 23: 
  What are carbohydrates made up of?

  Answer: 

  The carbohydrates are made of carbon, hydrogen and oxygen.

   

  Question 24: 
  From where do plants get raw materials to prepare their food? 

  Answer: 

  Plants get raw materials to prepare their food from their surroundings.

   

  Question 25: 
  Where does the synthesis of food in a plant usually take place?

  Answer: 

  The synthesis of food in plants occurs in leaves.

   

  
  
  
  
  

  Question 26: 
  What is the ultimate source of energy for all living organisms?

  Answer: 

  Sun is the ultimate source of energy for all living organisms.

   

  Question 27: 
  Write an equation that represents the process photosynthesis.

  Answer:

  
  

   

  Question 28: 
  Name the microorganisms which can fix atmospheric nitrogen in the soil.

  Answer: 

  Bacteria like Rhizobium can fix atmospheric nitrogen in the soil.

   

  Question 29: 
  What are the components of food?

  Answer: 

  Carbohydrates, proteins, fats, vitamins and minerals are components of food.

   

  
  
  
  
  

  Question 30: 
  What are insectivorous plants?

  Answer: Insect-eating plants such as pitcher plant are called insectivorous plants.

   

  Question 31: 
  What do you mean by nutrition?

  Answer: 

  Nutrition is the mode of taking food by an organism and its utilisation by the body.

   

  Question 32: 
  What do you mean by nutrition?

  Answer: 

  Nutrition is the mode of taking food by an organism and its utilization by the body.

   

  Question 33: 
  What are the different modes of nutrition found in plants?

  Answer: 

  (i) Autotrophic mode of nutrition

  (ii) Heterotrophic mode of nutrition

   

  
  
  
  
  

  Question 34: 
  List some harmful effect of fungi.

  Answer:

  1. Some fungi cause diseases in plants, animals including humans.

  2. They spoil fruits, vegetables and other foodstuff.

   

  Question 35: 
  Why photosynthesis is named so?

  Answer: 

  Since the synthesis of food occurs in the presence of sunlight, it is called photosynthesis (Photo: light; synthesis: to combine).

   

  Question 36: 
  What is the association of fungus and algae called?
  Or
  What is the symbiotic relationship between algae and fungi?

  Answer: 

  In organisms called lichens, a chlorophyll-containing partner, which is an alga, and a fungus live together.

   

  
  
  
  
  

  Question 37: 
  What are the other parts of plant where photosynthesis occurs except leaves?

  Answer: 

  Besides leaves, photosynthesis also takes place in other green parts of the plant — in green stems and green branches.

   

  Question 38: 
  What are heterotrophs? 

  Answer: 

  Animals and most other organisms take in ready-made food prepared by the plants. They are called heterotrophs (heteros = other).

   

  Question 39: 
  What are stomata?

  Answer: 

  Tiny pores are present on the surface of the leaves which helps in exchange of gases. Such pores are called stomata.

   

  Question 40: 
  What are called autotrophs?

  Answer: 

  Organisms able to make food themselves from simple substances are called autotrophs.

   

  
  
  
  
  

  Question 41: 
  What is heterotrophic nutrition?

  Answer: 

  Heterotrophic nutrition is the mode of nutrition in which organisms depend upon other organisms to survive.

   

  Question 42: 
  What are nutrients?

  Answer: 

  Carbohydrates, proteins, fats, vitamins and minerals are components of food. These components of food are called nutrients.

   

  Question 43: 
  What is chlorophyll?

  Answer: 

  A green pigment present in all green plants which helps leaves to capture the energy of the sunlight is called chlorophyll.

   

  Question 44: 
  Where and in what conditions do fungi grow?

  Answer: 

  Fungi grow on pickles, leather, clothes and other articles that are left in hot and humid weather for long time.

   

  
  
  
  
  

  Question 45: 
  How do fungi grow and develop?

  Answer: 

  The fungal spores are generally present in the air. When they land on wet and warm things they germinate and grow.

   

  Question 46: 
  Why algae are green in colour?

  Answer: 

  They contain chlorophyll which gives them the green colour. Algae can also prepare their own food by photosynthesis.

   

  Question 47: 
  What are the tiny openings on the surface of a leaf called?

  Answer: 

  Tiny pores are present on the surface of the leaves which helps in exchange of gases. Such pores are called stomata.

   

  Question 48: 
  What is the role of guard cells in stomata?

  Answer: 

  Guard cells help to regulate the rate of transpiration by opening and closing the stomata.

   

  
  
  
  
  

  Question 49: 
  What are the raw materials required for photosynthesis?
  Or
  What are the various raw materials for photosynthesis?

  Answer: 

  Chlorophyll, sunlight, carbon dioxide and water are necessary to carry out the process of photosynthesis.

   

  Question 50: 
  What are called parasites?

  Answer: 

  Parasites are those organisms which grow on other plants or animals for their food. Example: Cuscuta

   

  Question 51: 
  Do insectivorous plants perform photosynthesis?

  Answer: 

  Insectivorous plants got leaves therefore they can photosynthesis, which means they can prepare their food in the presence of sunlight.

   

  Question 52: 
  Why can't humans or animals prepare their own food using CO₂ water and minerals as the green plants do?

  Answer: 

  Plants can make their food themselves but humans or animals cannot because they do not possess chlorophyll pigment for photosynthesis.