Solution of Chapter 1. Nutrition in Plants (NCERT Science Book)

Why do organisms need to take food?

Distinguish between a parasite and a saprotroph.

How would you test the presence of starch in leaves?

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

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 synthesize their own food.

b. The food synthesized 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 tabular stem.

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

iii. The pores through which leaves exchange gases.

Amarbel is an example of:

i. autotroph
ii. Parasite
iii. Saprotroph
iv. host

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 synthesize 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)

Choose the correct option from the following:

Which part of the plant gets carbon dioxide from the air for photosynthesis?

i. root hair

ii. Stomata

iii. Leaf veins

iv. Sepals.

Choose the correct option from the following:

Plants take carbon dioxide from the atmosphere mainly through their:

(i) root

(ii) stem

(iii) flowers

(iv) Leaves