Nutrition In Plants For Class 7 Questions With Answers: Some important questions and answers for Class 7 Science Chapter 1 (Nutrition in Plants) is given:-
Question (1) What are the plants that make their own food called?
Answer: green plants that are capable of making their own food are autotrophs.
Question (2) Why do organisms need food?
Answer: Organisms obtain nutrients for themselves through food, which are necessary for the body of organisms. like – growth, the structure of the body, etc.
At the same time, nutrients are also necessary for the maintenance of the damaged parts of the organisms and provide them with the necessary energy for various biological processes. Hence the organisms require food.
Question (3) Explain the difference between a parasite and a mortal.
Answer: (a)Parasites obtain nutrition from other living organisms such as invertebrates. mortals obtain nutrients from dead, decaying organic matter such as fungi.
(b) The system of obtaining nutrition in parasites is called a heterotrophic system and the method of obtaining nutrition in mortal remains is called a mortifying system.
Question (4) Briefly describe the process of food synthesis in green plants.
Answer: Photosynthesis requires sunlight, chlorophyll, carbon dioxide, and water.
Green plants have green leaves and green leaves have chlorophyll.
In the presence of sunlight, green leaves synthesize food by obtaining carbon dioxide from the air and water, and other minerals from the soil.
In this process, carbohydrates are synthesized and oxygen is released, and Carbohydrate gets converted into starch.
Carbon Dioxide + Water + Chlorophyll + Sunlight Carbohydrate + Oxygen
Question (5) The pigment by which solar energy is stored in the process of photosynthesis is called?
Answer: The pigment by which solar energy is stored in the process of photosynthesis is chlorophyll.
Question (6) What are the types of nutrition in plants?
Answer: The main elements in carbohydrates, fats, and proteins are carbon, hydrogen, and oxygen. Along with these three elements, plants need many elements to survive. All these minerals are nutritional and they are absorbed by the roots of plants in the form of salt.
Additional Questions and Answers
(i) What is photosynthesis?
(a) food-making process by humans
(b) the process of making food by plants
(c) looking up at the sky in the light
Answer: (b) the process of making food by plants
(ii) What is required for photosynthesis?
(a) carbon dioxide
(b) water
(c) sunlight
Answer: (c) sunlight
(iii) What is not required for photosynthesis?
(a) Carbon dioxide
(b) oxygen
(c) sunlight
Answer: (b) oxygen
(iv) Which plant is called the nitrogen-fixing plant?
Answer: leguminous plants
(v) What are the essential components of photosynthesis?
Answer: Sunlight, chlorophyll, carbon dioxide, and water are essential components for photosynthesis. In the absence of any of these, photosynthesis does not occur.
(vi) What is heterotrophy?
Answer: The organisms that feed on other organisms and depend on them are called heterotrophs. For example humans and all other animals
