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.