WORKSHEET 3 (NUTRITION IN PLANTS, Class7)

Nutrition in Plants

Q1. Fill in the blanks.

                           i.        In photosynthesis solar energy is captured by the pigment called ................

                          ii.        During photosynthesis plants take in ............. and release ..........

                         iii.        ,,,,,,,,,,,,,,,, in plant take in carbon dioxide from the air for photosynthesis.

                         iv.       ...................... are the products of photosynthesis.

Q2. True/False

                           i.        The food synthesized by the plants is stored as starch. 

                          ii.        Plants take carbon dioxide from the atmosphere mainly through their leaves. 

                         iii.        Solar energy is converted into electrical energy during photosynthesis. 

                         iv.        Carbon dioxide is released during photosynthesis. 

                          v.        The starch is also a carbohydrate. 

Q3. Name a parasitic plant with yellow, slender and tubular stem.

Q4. Give one example of parasite.

Q5. Name one plant that traps and feeds on insects.

Q6. Name a plant that has both autotrophic and heterotrophic mode of nutrition. 

Q7. What are fluffy umbrella-like patches growing on rotting wood during the rainy season called? 

Q8. How can cells be seen?

Q9. Where is nucleus located in a cell?

Q10. What are carbohydrates made up of?

Q11. From where do plants get raw materials to prepare their food?

Q12. Where does the synthesis of food in a plant usually take place?

Q13. What is the ultimate source of energy for all living organisms?

Q14. Write an equation that represents the process photosynthesis.

Q15. What are the components of food?

Q16. What are insectivorous plant

Q17. Why photosynthesis is named so?

Q18. What are stomata?

ANSWERS

1. (i) chlorophyll (ii)carbon dioxide and oxygen(iii) Stomata(iv)  Carbohydrates

2. T, T, F, F, T

3 Ans. Cuscuta

4 Ans. Amarbel

5 Ans. Pitcher Plant

6 Ans. Insectivorous Plant

7 Ans. Mushroom. These organisms are called fungi.

8 Ans. Most type of cells can be seen only under the microscope.

9 Ans. In most of the cell, nucleus is centrally located.

10 Ans. The carbohydrates are made of carbon, hydrogen and oxygen.

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

12 Ans. The synthesis of food in plants occurs in leaves.

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

14 Ans:

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

16 Ans. Insect-eating plants such as pitcher plant are called insectivorous plants.

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

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