CBSE Class 7 Science Nutrition in Plants Worksheet with Solution by Expert Science Mam. Students of 7th Grade can solve this worksheet for extra preparation before exam. Private Teacher or Guardians of the Students can copy all the questions of this chapter and will match after solve their students.
Nutrition in Plants Class 7 Worksheet
Worksheet for Chapter No.1): – Nutrition in Plants
The following questions are important for your exams for 1 mark 2 mark or 5 marks. First solve the questions on your own and then saw the solution for understanding it better.
Practice worksheet for class 7
Section A
Q.1.) Why living organisms take food?
→ Living organisms take food for their growth and maintenance of their body.
Q .2.) What is the function of nutrients?
→ 1.) Nutrients enable living organisms to build their body and to grow.
2.) Nutrients provide energy to carry out their life processes.
3.) Nutrient helps organisms to repair their damaged body parts.
Q.3.) What is nutrition explain types?
→ Nutrition is defined as mode of taking food by an organism and its utilization by the body.
Nutrition is of two types:-
1.) Autotrophic mode of nutrition
2.) Heterotrophic mode of nutrition
Q.4.) What is stomata?
→ The tiny pores present on the surface of the leaf surrounded by guard cells ,
such tiny pores called as stomata.
Q.5.) What is the function of stomata?
→ Carbon dioxide from air is taken in through the tiny pores called as stomata.
Q.6.) Which part of the plant termed as food factory of a plant?
→ Leaves are the food factories of a plant.
Q.7.) What is chlorophyll?
→ The green pigment present in leaves called as chlorophyll pigment.
Q.8.) Write the function of chlorophyll pigment?
→ Chlorophyll helps leave to capture the energy of the sunlight and the energy is used to synthesize food from carbon dioxide and water.
Q.9.) Define photosynthesis ?
→ Plants synthesize their own food by using carbon dioxide and water with the help of sunlight and chlorophyll, this process is called as photosynthesis.
Q.10.)Name the parts of a plant in which photosynthesis taking place ?
→ Along with the leaves, photosynthesis also takes place in other green parts of plant like green stain and green branches.
Q.11.) How desert plant perform photosynthesis?
→ The desert plant has skill or spine like leaves to reduce loss of water by transpiration. These plants have green stems which carry out photosynthesis.
Q.12.) Write the equation for photosynthesis.
→
Q.13.) How photosynthesis is beneficial for humans?
→ The photosynthesis is the process in which plants produce their own food by using carbon dioxide and water with the help of sunlight and chlorophyll pigment and during the process carbohydrate and oxygen gets released. As human required oxygen for the process of respiration , oxygen plays very important role in energy formation during many metabolic processes.
As a photosynthesis releases oxygen hence, it is beneficial for humans.
Q.14.) How plants get nitrogen?
→ The nitrogen is present in gaseous form in the air. Plants cannot absorb nitrogen directly from air. Soil has certain bacteria that convert gaseous nitrogen into a usable form and released it into the soil.
Then ,nitrogen absorbed by the plants.
Q.15.) Define heterotrophic mode of nutrition?
→ The mode of nutrition in which animals cannot produce their own food, they depend on others for their food called as heterotrophs .
Example:- humans and animals.
Q.16.) Define the following term
1.) Host :- Host is the plant on which the parasite is present and deprives their valuable nutrients.
2.) Parasite:- parasite is a organism which doesn’t have chlorophyll and it takes readymade food from the plant on which it is climbing .
3.) Insectivorous plants:- insect eating plants are called as insectivorous plants.
Q.17.) What is saprotrophic nutrition?
→ The mode of nutrition in which organisms take in nutrients from dead and Deccan matter is called as saprotrophic mode of nutrition.
Q.18.) Define saprotrophs and give example.
→ The organisms which take nutrients from dead and decaying matter called as saprotrophs.
Example:- fungi growing on bread.
Q.19.) Explain symbiosis?
→ Organisms live together and share both shelter and nutrients. This relationship called as symbiosis. Certain fungi live inside the roots of plants. The plants provide nutrients to the fungus and in written the fungus provides water and certain nutrients to the plant.
Q.20.) How nutrients replenished in the soil?
→ Plants absorb minerals and nutrients from the soil so their amounts in the soil keep on decreasing, fertilizers and manure contain nutrients such as nitrogen potassium and phosphorus. these nutrients need to be added from time to time to enrich the soil.
Q.21.) Explain the symbiotic relationship between rhizobium and plants?
→ Rhizobium is important bacteria present in soil which cannot make its own food but it can take atmospheric nitrogen and convert it into usable form. Rhizobium leaves in roots of gram peas mung beans and other legumes and provide them with nitrogen. In return the plants provide food and shelter to the bacteria. This is a symbiotic relationship in the rhizobium and the plants.