E
RY SHORT ANSWER TYPE QUESTIONS
State whether the following statements are true or false.
(0) Photosynthesis is carried out by the roots of a plant. T
(b) lodine solution gives pink colour in the presence of starch.
(c) Stomata help in the exchange of gases between the leaves
surroundings. True
d) Plants and animals are interdependent for their survival. T
-) Leaves of different plants are of the same shape and size. F
ve one word answer for the following.
The process of preparing food by green plants.
The gas released by plants during the process of photosynthesis.
Answers
Answer:
b) false thank ❤ u
Explanation:
b) false.
Answer:
Why do organisms need to take food?
Ans. Food is needed by all organisms for many purposes:
(a) The main function of food is to help in growth.
(b) Food provides energy for movements such as running, walking etc.
(c) Food is also needed for replacement and repairing damaged parts of body.
(d) Food gives us resistance to fight against diseases and protects us from infections.
Q.2. Distinguish between a parasite and a saprotroph.
Q.3. How would you test the presence of starch in leaves?
Ans. The presence of starch in leaves can be tested by Iodine test.
• When we remove chlorophyll from leaf by boiling it in alcohol.
• Put 2 drops of iodine solution and observe.
• Its colour change to blue indicates the presence of starch.
Q.4. Give a brief description of the process of synthesis of food in green plants.
Ans. The green plants have chlorophyll in the leaves. The leaves use C02 and water to
make food in presence of sunlight.
Q.5. Show with the help of a sketch that the plants are the ultimate source of food.
Q.6. Fill in the blanks:
(a) Green plants are called autotrophs since they synthesize their own food.
(b) The food synthesized by the plants is stored as starch.
(c) In photosynthesis solar energy is captured by the pigment called chlorophyll.
(d) During photosynthesis plants take in carbon dioxide and release oxygen.
Q.7. Name the following:
(i) A parasitic plant with yellow, slender and tubular stem. – cuscuta.
(ii) A plant that has both autotrophic and heterotrophic mode of nutrition. -
Insectivorous plant.
(iii) The pores through which leaves exchange gases. – Stomata.
Q.8. Tick the correct answer:
(a) Amarbel is an example of:
(i) Autotroph (ii) Parasite (iii) Saprotroph (iv) Host
(b) The plant which traps and feeds on insects is:
(a) Cuscuta (ii) China rose (iii) Pitcher plant (iv) Rose
Q.9. Match the items given in Column I with those in Column II:
Q.10. Mark T’ if the statement is true and ‘F’ if it is false:
(i) Carbon dioxide is released during photosynthesis. False
(ii) Plants which synthesise their food themselves are called saprotrophs. False
(iii) The product of photosynthesis is not a protein. True
(iv) Solar energy is converted into chemical energy during photosynthesis. True.
Q.11.Choose the correct option from the following.
Which part of the plant takes in carbon dioxide from the air for photosynthesis?
(i) Root hair (ii) Stomata (iii) Leaf veins (iv) Sepals
Q.12. Choose the correct option from the following:
Plants take carbon dioxide from the atmosphere mainly through their:
(i) Roots (ii) Stem (iii) Flowers (iv) Leaves
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