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OTI365 - Olympiad -VII Standard
Olympiad Class VII Science - Nutrition in Plants Important Questions

Science - Nutrition in Plants

Exam Duration: 45 Mins Total Questions : 30

1 )

Which of the following is insectivorous?

(a)
Mushroom
(b)
Cuscuta
(c)
Mucor
(d)
Nepenthes

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.

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

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.

5 )

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

(a)
Midrib
(b)
Stomata
(c)
Vascular bundles
(d)
Veins

6 )

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.

7 )

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.

8 )

Symbiosis is the phenomenon in which two different kinds of organisms pool together their nutritional requirements. Which of the following options represents such association?

9 )

Which of the following types of nutrition is exhibited by the figure given below?

(a)
Autotrophic nutrition.
(b)
Saprophytic nutrition.
(c)
Parasitic nutrition.
(d)
Symbiotic nutrition.

10 )

Which labelled arrow represents the movement of water?

(a)
P
(b)
Q
(c)
R
(d)
S

11 )

Where does most of the transpiration take place in the given figure?

(a)
P
(b)
R
(c)
Q
(d)
S

12 )

What is the principal source of energy input to biological systems?

(a)
Carbohydrates from plants.
(b)
Light from the sun.
(c)
Nutrients from the soil.
(d)
Oxygen from the air.

13 )

How does most carbon dioxide reach into the photosynthesising cells of a green leaf?

(a)
Through the hypodermis of the leaf.
(b)
Diffusion through the stomata of the leaf.
(c)
Movement through the phloem.
(d)
Movement through the xylem C.

14 )

Which of the following organisms are found as slimy, green patches on ponds or on stagnant water?

(a)
Fungi
(b)
Bryophytes
(c)
Bacteria
(d)
Algae

15 )

Leaves are green due to the presence of a green coloured pigment called chlorophyll. Which of the following is the main function of chlorophyll?

(a)
To absorb carbon dioxide from the atmosphere.
(b)
To absorb water and minerals from the soil.
(c)
To give greenish colour to the leaves.
(d)
To trap sunlight.

16 )

Fungi does not contain chlorophyll to synthesise their food. Then how do they get their food?

(a)
From dead and decaying plants.
(b)
By photosynthesis.
(c)
By eating small insects which come near it.
(d)
From the water we pour near it.

17 )

A plant was kept in a dark room for a week. When its leaves were tested with iodine solution, it did not show the presence of starch. From this experiment we can conclude that is essential for photosynthesis.

(a)
Sunlight
(b)
Oxygen
(c)
Carbon dioxide
(d)
Water

18 )

What is the function of root nodules in leguminous plants?

(a)
Store food
(b)
Provide extra strength
(c)
Perform photosynthesis
(d)
Give shelter to bacteria

19 )

Which function is performed by the bacteria present in the root nodules of leguminous plants?

(a)
To store food.
(b)
To perform photosynthesis.
(c)
To fix the atmospheric nitrogen.
(d)
To simplify the complex minerals present in the soil.

20 )

In nepenthes plant, leaves are modified into which of the following structures?

(a)
Leaf tendrils for mechanical support.
(b)
Spines to reduce the loss of water.
(c)
Pitchers to trap the insects.
(d)
Fleshy leaves to store the food and water.

21 )

Which statement is true about parasitic plants?

(a)
Organisms which prepare food on their own.
(b)
Organisms which break glucose into alcohol and carbon dioxide.
(c)
Organisms which draw nutrition from living tissues of other plants.
(d)
Plants which kill insects for their food C.

22 )

Which of the following is an insectivorous plant?

(a)
Sundew
(b)
Lichen
(c)
Fern
(d)
Mould

23 )

Which statement describes symbiosis?

(a)
A mutually beneficial relationship between two organisms.
(b)
Interdependence between two organisms.
(c)
Phenomenon in which carnivorous plants kill insects as well as prepare food through photosynthesis.
(d)
Dependence on another organism for its habitat.

24 )

Carbohydrates, the most abundant biomolecules on Earth are produced by which of the following organisms?

(a)
Some bacteria, algae and green plant cells.
(b)
All bacteria, fungi and algae.
(c)
Fungi, algae and green plant cells.
(d)
Viruses, fungi and bacteria.

25 )

Which process causes oxygen to enter the atmosphere?

(a)
Fat metabolism
(b)
Respiration
(c)
Photosynthesis
(d)
All of these

26 )

Which of the following statements is true about the importance of photosynthesis?

(a)
Source of food for all living organisms.
(b)
It converts atmospheric carbon dioxide to glucose.
(c)
It provides nourishment and helps in the growth and development of plants.
(d)
All of these

27 )

What is the function of the bacteria present in the roots of bean plants.

(a)
Breaks down nitrates into nitrogen.
(b)
Converts ammonium salts into nitrogen.
(c)
Converts nitrogen into nitrates.
(d)
Converts nitrates into ammonium compounds.

28 )

Amarbel is an example of

(a)
autotroph
(b)
parasite
(c)
saprotroph
(d)
host.

29 )

Where does most of the water for photosynthesis come from?

(a)
From the soil through the roots of the plant.
(b)
From air through the tiny pores in the leaf.
(c)
As a result of respiration within the leaf.
(d)
From water vapour in the air.

30 )

Which of these plants trap and feed on insects?

(a)
Cuscuta
(b)
China rose
(c)
Pitcher plant
(d)
Rose

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Olympiad Class VII Science - Nutrition in Plants Important Questions

Science - Nutrition in Plants

Exam Duration: 45 Mins Total Questions : 30

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