PSEB solutions class 7 science chapter 1 

PSEB solutions class 7 science chapter 1 

Fill in the blanks answers

• Nutrition
• Carbon dioxide
• Glucose
• Heterotrophs

 

State true or false

• False
• True
• True
• False

 

Match the following

Agaricus        saprophyte

Rhizobium – leguminous plants

Chlorophyll – leaves

Cuscuta – parasite

 

Choose the correct option:

• An Organism ……………… nitrogen in the soil is:
• Rhizobium

 

• The Organisms that ……………….. and depends on others for food are known as:
• Heterotrophs

 

• The food ……………… plants is:
• Leaf

 

• Which of ……………….. is a saprophyte?
• Cuscuta

 

 

Short answer type question:

 

• Define Nutrition.
• Nutrition is the process by which an organism obtains and utilizes food.

 

• What is photosynthesis?
• The photosynthesis process involves green plants preparing their food using chlorophyll in the presence of CO2, water, and sunlight.Green plants convert light energy into chemical energy.

 

• Name the raw materials required for photosynthesis.
• Carbon dioxide and water

 

• What are insectivorous plants?
• Plants that consume insects have structures that trap and digest insects are known as insectivorous plants.