What will you learn in this course

1. Why do organisms take food?

2. Distinguish between a parasite and a saprotroph?

3. How would you test the presence of starch in leaves?

4. Give a brief description of the process of synthesis of food in green plants.

5. Show with the help of a sketch that plants are the ultimate source of food.

6. Fill in the blanks: (a) Green plants are called _________________ since they synthesise their own food.

(b) The food synthesised by plants is stored as _________________.

(c) In photosynthesis solar energy is absorbed by the pigment called ___________.

(d) During photosynthesis plants take in ______________________ and release __________________ gas.

7. Name the following:

(i) A parasitic plant with a yellow, slender, and branched stem.

(ii) A plant that is partially autotrophic.

(iii) The pores through which leave exchange gases.

8. Tick the correct answer:

(a) Cuscuta is an example of:

(i) Autotroph              (ii) Parasite           (iii) Saprotroph             (iv) Host

(b) The plant which traps and feeds on insects is:

(i) Cuscuta                (ii) China rose            (iv) Pitcher plant          (iv) Rose

9. Match the items given in Column I with those in Column II:

Column I                         Column II

Chlorophyll                     Rhizobium

Nitrogen                         Heterotrophs

Cuscuta                           Pitcher plant

Animals                           Leaf

Insects                             Parasite

10. Mark ‘T’ if the statement is true and ‘F’ if it is false:

(i) Carbon dioxide is released during photosynthesis. (T/F)

(ii) Plants that synthesize their food are called saprotrophs. (T/F) 

(iii) The product of photosynthesis is not a protein. (T/F)

(iv) Solar energy is converted into chemical energy during photosynthesis. (T/F) 

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) Petals

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

13. Why do farmers grow many fruits and vegetable crops inside large greenhouses? What are the advantages to the farmers?