Nutrition in Plants Test

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Nutrition in Plants Test - 10

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Weekly Quiz Competition

Question 1
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Which of the following events occurs in photosynthesis?

A
It converts light energy into chemical energy.

B
It creates useful energy.

C
It fixes CO$$_2$$ into carbohydrates.

D
It reverses the action of respiration.

Solution

Photosynthesis is essentially an energy conversion process in which the energy from photons of light is trapped by plant pigment chlorophyll and is used to synthesize sugars. Thus, light energy is converted into chemical energy of sugar molecule.
So, the correct answer is option A.
Question 2
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A manure should supply which of the following nutrients to plants?

A
Nitrogen

B
Phosphorus

C
Potassium

D
All of the above

Solution

Manure is an excellent fertilizer containing nitrogen, phosphorus, potassium and other nutrients. It also adds organic matter to the soil which may improve soil structure, aeration, soil moisture-holding capacity and water infiltration.
So, the correct answer is option D.
Question 3
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The function of the root nodules is:

A
To store food

B
To provide extra strength

C
To perform photosynthesis

D
To give shelter to bacteria
Solution
- Certain plants provide shelter to nitrogen-fixing bacteria in small swollen structures present on the roots called root nodules.
- The nitrogen-fixing bacteria, colonize the roots of the plants. This initiates the formation of nodules on the roots.
- The bacteria then use those nodules as their shelter. Plants cannot use atmospheric nitrogen directly.
- Therefore, nitrogen-fixing bacteria present in root nodules fix nitrogen or convert the atmospheric nitrogen into usable forms that can be taken up by the plants.
Thus, the correct answer is option D.
Question 4
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"The process of absorption and conversion of ................. energy into .................. energy by green plants is called as photosynthesis".

A
Chemical, light

B
Mechanical, chemical

C
Light, chemical

D
Thermal, light
Solution
- Autotrophs absorb water and minerals from the soil and use the light energy of the sun to synthesize sugars (chemical energy).
- Photosynthesis is a redox reaction in which water is oxidized and carbon dioxide is reduced.
So, the correct answer is option C.
Question 5
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Which of the following eats the fruits of trees?

A

B

C

D
Solution
- According to their food requirements, living organisms can be producers that produce their own food by photosynthesis or consumers, which depend on producers for their food.
- Among consumers, organisms that eat plant and their products are called herbivores, and the ones that eat other animals are carnivores.
- In the given question, the first, third, and fourth images are of a cat, eagle, and snake. All of them are carnivores. While the second image is that of a monkey, which is a herbivore.
So, option B is the correct answer.
Question 6
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A carnivore eats

A
Sprouted seeds

B
Milk

C
Green leaves

D
Flesh of other animals

Solution

Carnivore is an animal which eats the flesh of other animals. They are placed at the top of a food chain. They obtain their prey either by predation or scavenging. The scavengers feed on the flesh of dead animals while the predator involves the killing of prey to fulfill the nutritional requirement. For example, lion and tiger.
So, the correct answer is 'Flesh of other animals'.
Question 7
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What are the characteristics of heterotrophic nutrition?

A
Heterotrophic organisms have chlorophyll.

B
Heterotrophic organisms are able to build up their own organic food from raw materials.

C
Heterotrophic organisms cannot make their own food.

D
All of the above

Solution

Heterotrophic organisms depend on autotrophs (plants) for their food supply. They cannot make their own food and hence they obtain food directly from plants or from plant-eating animals.
So, the correct answer is option C.
Question 8
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The function of bacteria present in the root nodules of leguminous plants is

A
To store food.

B
To perform photosynthesis.

C
To fix the atmospheric nitrogen.

D
To simplify the complex minerals present in the soil.
Question 9
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Which of the following is a parasitic plant?

A
Cactus

B
Cauliflower

C
Dodder

D
Cucumber
Solution
- Dodder (Cuscuta) is a parasitic plant. It lacks chlorophyll hence it appears as yellow tubular structures.
- They develop haustoria or sucking roots which go into the vascular bundles of the host plant and absorb from them the prepared food and water.
Thus, the correct answer is option C.
Question 10
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Parasites are:

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 plants and animals.

D
Plants which kill insects for their food.
Solution
- A parasite is an organism that lives on or in a host organism and gets its food or nutrition from its host (plants and animals). There are three main classes of parasites that can cause disease in humans: protozoa, helminths and ectoparasites.
- Parasites come in many shapes and sizes and include viruses and bacteria, various worms, plants, fungi, insects, and even birds and mammals.
So, the correct answer is 'Organisms which draw nutrition from living tissues of plants and animals'.

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Nutrition in Plants Test - 10

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Nutrition in Plants Test - 10

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SHARING IS CARING

Question 1

It converts light energy into chemical energy.

It creates useful energy.

It fixes CO$$_2$$ into carbohydrates.

It reverses the action of respiration.

Solution

Question 2

Nitrogen

Phosphorus

Potassium

All of the above

Solution

Question 3

To store food

To provide extra strength

To perform photosynthesis

To give shelter to bacteria

Solution

Question 4

Chemical, light

Mechanical, chemical

Light, chemical

Thermal, light

Solution

Question 5

Solution

Question 6

Sprouted seeds

Milk

Green leaves

Flesh of other animals

Solution

Question 7

Heterotrophic organisms have chlorophyll.

Heterotrophic organisms are able to build up their own organic food from raw materials.

Heterotrophic organisms cannot make their own food.

All of the above

Solution

Question 8

To store food.

To perform photosynthesis.

To fix the atmospheric nitrogen.

To simplify the complex minerals present in the soil.

Question 9

Cactus

Cauliflower

Dodder

Cucumber

Solution

Question 10

Organisms which prepare food on their own.

Organisms which break glucose into alcohol and carbon dioxide.

Organisms which draw nutrition from living tissues of plants and animals.

Plants which kill insects for their food.

Solution

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