Class 7 Nutrition in Plants Important Questions VBQs

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Fill in the blanks:

1. The components of food that are necessary for our body are called _____.

2. The components of food include _____, _____, ______, ______ and ___.

3. _____ and ______ are directly or indirectly dependent on plants.

4. ______are the only organisms that can prepare their own food using ____, _____, _____, and     ___.

5. ______ is the mode of taking food by an organism and its utilization by the body.

6. The green pigment in leaves is called _____.

7. ______ which is essential for the survival of all organisms is produced during photosynthesis.

8. During photosynthesis plants synthesize ______, which ultimately gets converted into _____.

9. Slimy, green patches in ponds and other stagnant water bodies are due to the growth of organisms called _____.

10. Carbohydrates are made of _____, _____ and _____.

11. _____ are nitrogenous substances that contain nitrogen.

12. Soil has certain ______ that convert gaseous nitrogen into usable form and release it into the soil.

13. Cuscuta (Amerbel) uses _______ mode of nutrition.

14. The Pitcher plant eats ______ and is hence a _______ plant.

15. ______ are organisms that have no chlorophyll and no mouth like animals and feed on dead and decaying organic matter.

16. Some organisms live together and share shelter and nutrition. This is called _____relationship.

17. The organism Lichen has a symbiotic relationship between an___ and a ____

18. ____ and ____ are essential requirements for photosynthesis.

19. ____ energy is stored in the form of food in the leaves with the help of chlorophyll.

20. During photosynthesis plants take in ____ and release _____ into the air.

Answer the following:

1. Where do plants synthesize their food?

2. Why are algae green in colour? Where do they grow?

3. What are the various components of food?

4. Why do organisms need to take food?

5. Name the pores through which leaves exchange gases.

6. How does the following raw material reach the leaves of a plant for preparing food:

a. Water and minerals b. Carbon-dioxide:

7. Explain photosynthesis in brief. Give an equation to represent the process.

8. If two similar potted plants A & B are taken such that:

Plant A is kept in the dark or a black box for 72 hours (3 days), Plant B is kept in sunlight.

Iodine test is conducted with the leaves of both plants. Which plant leaf tests positive for the test and Why?

9. Why is the sun considered as the ultimate source of energy for all things?

10. Define the following and give one example of each:

a. Autotrophic nutrition b. Heterotrophs

11. Label the following diagram of stomata:

12. Give the mode of nutrition for the following:

a. Amerbelb. Rose c. Pitcher plant d. Deer e. Cow

f. Mushroom Pig h .Cabbage i. Yeast j. Man

MULTIPLE CHOICE QUESTIONS:

1. Plants take carbon dioxide from air during photosynthesis from

a. root hair b. leaves c. water d. flowers

2. Presence of starch can be tested by

a. alcohol b. iodine c. water d. hydrochloric acid

3. Which part of plant gets CO2 from air during photosynthesis

a. root hair b. sepal c. stomata d. leaf vein

4. Green plants are also known as

a. autotrophs b. heterotrophs c. carnivores d. saprophytes

5. The green pigment in leaves help to

a. make food b. absorb water c. absorb sunlight d. take in CO2

6. In a cactus plant, the part responsible for photosynthesis is

a. leaf b. thorn c. root d. stem

7. Which of these products is not stored as food in plants

a. protein b. vitamins c. oxalic acid d. oil

8. The simplest carbohydrate made as food during photosynthesis is 

a. starch b. sugar c. glucose d. oil

9. Cuscuta plant can be categorized as

a. parasite b. insectivorous c. saprophyte d. host

10. The plant that traps and feeds on insects

a. cuscuta b. china rose c. rose d. pitcher plant

11. The leather objects that are kept in hot humid weather for a long time are spoiled due to the growth of

a. algae b. yeast c. fungi d. moss

12. The Rhizobium bacteria lives inside the root nodules of

a. peas b. beans c. peanuts d. all of the above

VALUE BASED QUESTION:

Reena segregates the waste at home and put the bio degradable waste in a pot containing soil. She leaves it for 15 days and uses that soil for her plants in the garden. Why do you think she did so?

Lab activity

Objective: To test a leaf for presence of starch.

Materials required: Green leaves, Beaker, tripod stand, burner, test tube, alcohol, iodine solution, petridish, water.

Procedure:

Diagram:

Observation: Conclusion:

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