Olympiad Science - Nutrition in Plants
Exam Duration: 45 Mins Total Questions : 30
Which of the following is insectivorous?
- (a)
Mushroom
- (b)
Cuscuta
- (c)
Mucor
- (d)
Nepenthes
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
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
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.
Which part of the leaf controls the rate of loss of water to the air?
- (a)
Midrib
- (b)
Stomata
- (c)
Vascular bundles
- (d)
Veins
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.
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.
Symbiosis is the phenomenon in which two different kinds of organisms pool together their nutritional requirements. Which of the following options represents such association?
- (a)
- (b)
- (c)
- (d)
Which labelled arrow represents the movement of water?
- (a)
P
- (b)
Q
- (c)
R
- (d)
S
Which of the following is the characteristic feature of organisms exhibiting symbiosis?
- (a)
Organism feeds on dead and decaying organic matter.
- (b)
Organism traps and feeds on insects.
- (c)
Two organisms live together and get benefitted from each other.
- (d)
One organism grows as parasite on the body of other
Where does most of the transpiration take place in the given figure?
- (a)
P
- (b)
R
- (c)
Q
- (d)
S
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.
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
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.
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
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.
Which of the following is present in root nodules of leguminous plants that fixes the atmospheric nitrogen?
- (a)
Rhizobium bacteria
- (b)
Blue-green algae
- (c)
Nitrifying bacteria
- (d)
Paramoecium
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.
Which of the following is an insectivorous plant?
- (a)
Sundew
- (b)
Lichen
- (c)
Fern
- (d)
Mould
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.
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.
Which process causes oxygen to enter the atmosphere?
- (a)
Fat metabolism
- (b)
Respiration
- (c)
Photosynthesis
- (d)
All of these
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
Which structure in a green plant transports the synthesised food from leaves to all other parts of the plant body?
- (a)
Guard cell
- (b)
Mesophyll
- (c)
Phloem
- (d)
Xylem
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.
Amarbel is an example of
- (a)
autotroph
- (b)
parasite
- (c)
saprotroph
- (d)
host.
Lichens are examples of which of the following types?
- (a)
Symbiotic algae and fungi.
- (b)
Carnivorous plants.
- (c)
Animals which can perform photosynthesis.
- (d)
Parasitic algae.
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.
Which of these plants trap and feed on insects?
- (a)
Cuscuta
- (b)
China rose
- (c)
Pitcher plant
- (d)
Rose
The figure given below shows part of the carbon cycle.
- (a)
What is process R?Decomposition
- (b)
Respiration
- (c)
Photosynthesis
- (d)
Nutrition