Olympiad – Class VII – Science - Bio - Nutrition in Plants

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Question - 1

Which of the following is insectivorous?

  • A Mushroom
  • B Cuscuta
  • C Mucor
  • D Nepenthes

Question - 2

Which of the following statements is true about croton plants?

  • A Croton plants do not contain chlorophyll.
  • B Croton plants are dark red in colour Hence they depend on other plants for food.
  • C Croton plants have chlorophyll but it is hidden by dark red colour pigments.
  • D Croton plants are parasites.

Question - 3

Which of the following statement is/are NOT true about photosynthesis?
P - Carbon dioxide is essential for photosynthesis to take place.
Q - The products of photosynthesis are simple sugars.
R - Photosynthesis occurs in the green leaves of plants.
S- Sunlight is not used as an energy source by plants to make food during photosynthesis.

  • A P and S only
  • B Q, Rand S only
  • C P, Q and R only
  • D P, Q, Rand S

Question - 4

What is the aim of the given experiment?

  • A To show that air is a basic need of plants.
  • B To show that food is a basic need of plants.
  • C To show that water is a basic need of plants.
  • D To show that sunlight is a basic need of plants.

Question - 5

The equation given below represents photosynthesis.

Which of the following is represented by X and Y in the given equation?

  • A X - Carbon dioxide, Y- Oxygen
  • B X - Oxygen, Y- Carbon
  • C X - Carbon dioxide, Y- Hydrogen
  • D X - Oxygen, Y - Carbon dioxide

Question - 6

How does photosynthesis help to maintain the percentage of oxygen and carbon dioxide in the atmosphere?

  • A By giving off carbon dioxide and absorbing oxygen.
  • B By giving off oxygen and absorbing carbon dioxide.
  • C By releasing oxygen and carbon dioxide.
  • D By absorbing oxygen and carbon dioxide.

Question - 7

Which part of the leaf controls the rate of loss of water to the air?

  • A Midrib
  • B Stomata
  • C Vascular bundles
  • D Veins

Question - 8

What role does the insect play in the insectivorous plant?

  • A Fertilization process.
  • B Provides nutrients to the plant.
  • C Dispersal of seeds.
  • D Provides carbon dioxide to the plant.

Question - 9

What is the role of the bacteria in leguminous plants?

  • A Convert oxides of nitrogen into soil nitrates.
  • B Convert atmospheric nitrogen gas into soil nitrates.
  • C Convert soil nitrates into gaseous nitrogen.
  • D Convert plant proteins into ammonia.

Question - 10

Which of the following is true about parasitic plants?
(i) They absorb food from their host.
(ii) They compete with the host for sunlight.
(iii) They kill the host plant eventually.

  • A (i) and (ii) only
  • B (i) and (iii) only
  • C (ii) and (iii) only
  • D (i), (ii) and (iii)