Class 7 Science

Plant Nutrition

NCERT Solution Part 2

Question 7: Name the following:

(a) A parasitic plant with yellow, slender and tubular stem.
(b) A plant that has both autotrophic and heterotrophic mode of nutrition.
(c) The pores through which leaves exchange gases.

Answer: (a) Amarbel (cuscuta), (b) pitcher plant, (c) stomata

Question 8: Tick the correct answer:

(a) Amarbel is an example of:

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

Answer: (ii) Parasite

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

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

Answer: (iii) Pitcher plant

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

Column IColumn II
(1) Chlorophyll(a) Bacteria
(2) Nitrogen(b) Heterotrophs
(3) Amarbel(c) Pitcher plant
(4) Animals(d) Leaf
(5) Insect(e) Parasite

Answer: 1 → d, 2 → a, 3 → e, 4 → b, 5 → c

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

(i) Carbon dioxide is released during photosynthesis.
(ii) Plants which synthesise their food themselves are called saprotrophs.
(iii) The product of photosynthesis is not a protein.
(iv) Solar energy is converted into chemical energy during photosynthesis.

Answer: (i) F, (ii) F, (iii) T, (iv) T

Question 11: Choose the correct option from the following:

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

(i) Root hair
(ii) Stomata
(iii) Leaf veins
(iv) Sepals

Answer: (ii) Stomata

(b) Plants take carbon dioxide from the atmosphere mainly through their:

(i) Roots
(ii) Stem
(iii) Flowers
(iv) Leaves

Answer: (iv) Leaves