L-1 Nutrition in Plants CBSE-7 Science
Choose the correct answer.
Q1. What is the ultimate source of energy for all living organisms?
(a) Water energy
(b) Wind energy
(c) Solar energy
(d) Chemical energy
Answer
Answer: (c) Solar energy
Q2. Which one of the following is a pair of symbiotic organisms?
(a) Lichens
(b) Rhizobium and a legume
(c) None of these
(d) Both (a) and (b)
Answer
Answer: (d) Both (a) and (b)
Q3. Which of the following is an insectivorous plant?
(a) Pitcher plant
(b) Indian telegraph plant
(c) 4 ‘O’clock plant
(d) Cuscuta
Answer
Answer: (а) Pitcher plant
Q4. Which part of the plant is called its food factory ?
(a) Fruits
(b) Seeds
(c) Leaves
(d) Flowers
Answer
Answer: (c) Leaves
Q5. Tiny pores present on the surface of leaves through which gaseous exchange occurs are called
(a) stomata
(b) guard cells
(c) food holes
(d) gas holes
Answer
Answer: (a) Stomata
Q6. What is the ultimate source of energy for all living organisms?
(a) Water energy
(b) Wind energy
(c) Solar energy
(d) Chemical energy
Answer
Answer: (c) Solar Energy
Q7. Green pigment present in the leaves is called
(a) haemoglobin
(b) globulin
(c) albumin
(d) chlorophyll
Answer
Answer: (d) Chlorophyll
Q8. During photosynthesis plants
(a) take Oxygen and release Carbon-dioxide
(b) take Carbon-dioxide and release Oxygen
(c) take Carbon-dioxide but do not release Oxygen
(d) take Oxygen but do not release Carbon-dioxide
Answer
Answer: (b) Take Carbon-dioxide and release Oxygen
Q9. The end products of photosynthesis are
(a) carbohydrates, oxygen
(b) carbohydrates, hydrogen
(c) carbohydrates, water vapours
(d) carbohydrates, oxygen and water vapours
Answer
Answer: (а) carbohydrates, oxygen
Q10. Which one of the following is a parasite?
(a) Lichen
(b) Cuscuta
(c) Pitcher plant
(d) Rhizobium
Answer
Answer: (b) Cuscuta
Q11. Which of the following class of organisms belongs to saprotrophs?
(a) Fungi
(b) Algae
(c) Lichens
(d) Bryophytes
Answer
Answer: (а) Fungi
Q12. During photosynthesis
(а) solar energy is converted into chemical energy
(b) solar energy is converted into mechanical energy
(c) chemical energy is converted into mechanical energy
(d) bioenergy is converted into chemical energy
Answer
Answer: (а) solar energy is converted into chemical energy
Q13. The raw materials for photosynthesis are
(а) CO2
(b) CO2, O2, H2
(c) N2 water
(d) O2 water
Answer
Answer: (а) CO2