NCERT Solutions for Class 7 Term_policy Chapter 1 Nutrition In Plants

Why do organisms need to take food?

Distinguish between a parasite and a saprotroph.

How would you test the presence of starch in leaves?

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

Fill in the blanks:

(a) Green plants are called __________ since they synthesise their own food.

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

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

(d) During photosynthesis plants take in ___________and release ___________.

Name the following:

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

(ii) A plant that has both autotrophic and heterotrophic mode of nutrition.

(iii) The pores through which leaves exchange gases.

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

(i) Cuscuta

(ii) china rose

(iii) pitcher plant

(iv) rose

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

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

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

(ii) Plants which synthesise their food themselves 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)