class 7 revision nutrition in plants.

NUTRITION IN PLANTS REVISION QUESTIONS.

1.Potato and ginger are both underground parts that store food. Where is the food prepared in these plants?

 2. Photosynthesis requires chlorophyll, and a few other raw materials. Add the missing raw materials to the list given below: Water, minerals, _____________, ______________. 

SHORT ANSWER QUESTIONS

 3. A goat eats away all the leaves of a small plant (balsam). However, in a few days, new leaves could be seen sprouting in the plant again. How did the plant survive without leaves.

 4. Unscramble the following to form terms related to modes of nutrition. 

(i) RASPAEIT

 (ii) ROPEHYTSAP 

(iii) TOROPHAUT 

(iv) SIBIOMSYS 

5. Nitrogen is an essential nutrient for plant growth. But farmers who cultivate pulse crops like green gram, bengal gram, black gram, etc. do not apply nitrogenous fertilizers during cultivation. Why? 

6. Wheat dough if left in the open, after a few days, starts to emit a foul smell and becomes unfit for use. Give reason. 

7. Sunlight, chlorophyll, carbon dioxide, water and minerals are raw materials essential for photosynthesis. Do you know where they are available?

 Fill in the blanks with the appropriate raw materials.

 (a) Available in the plant : _______________ 

(b) Available in the soil : _______________, _______________

 (c) Available in the air : _______________ 

(d) Available during day : _______________

 8. Observe the diagram  and write its importance

9.Wild animals like tiger, wolf, lion and leopard do not eat plants. Does this mean that they can survive without plants? Can you provide a suitable explanation?

10. Define the following terms

a. Autotrophs        b. Photosynthesis      c. saprophytes.      d. parasites.