Class 7 Science
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:
Answer: (ii) Parasite
(b) The plant which traps and feeds on insects is:
(ii) China rose
(iii) Pitcher plant
Answer: (iii) Pitcher plant
Question 9: Match the items given in Column I with those in Column II:
|Column I||Column 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
(iii) Leaf veins
Answer: (ii) Stomata
(b) Plants take carbon dioxide from the atmosphere mainly through their:
Answer: (iv) Leaves