Food Chains

Q.

The correct sequence of the food chain is:

1. Grass → Bird → Insect → Snake

2. Snake → Bird → Insect → Grass

3. Grass → Insect → Bird → Snake

4. Grass → Snake → Bird → Insect

Q.

Do animals make their own food?

Q. The transfer of food energy from one living being to another living being is illustrated by

1. energy flow and transfer of nutrients
2. Biotic components only
3. Both (a) and (b)
4. abiotic components and decomposers

Q.

Give one word for the process of eating and being eaten.

Q.

Which of the following statements regarding food chain is false?

1. The detritus food chain begins with dead organic matter

2. All animals depend on plants for their food requirement

3. In terrestrial ecosystems, a large fraction of energy flows through detritus food chain

4. Primary consumers belong to the first trophic level

Q. The correct sequence of the food chain from producer to consumer is:

1. Grass
2. Insect
3. Bird
4. Snake

Q.

Choose the correct statement
Assertion [A]: Marine ecosystems have less trophic levels than terrestrial ecosystems.
Reason [R]: Most of phytoplankton is available for consumption and assimilation by primary consumers in aquatic ecosystems.

1. A is true and R is false
2. Both A and R are true R does not explain A
3. A is false and R is true
4. Both A and R are true and R explains A

Q.

Give one word for the sequence of steps in which living organisms draw their food.

Q.

Choose the option that correctly matches the groups of organisms in an ecosystem with the specific terms used for them.

$$\begin{array}{ccc}1& 2& 3\\ Greenplants& Deer& Bacteria\\ Grass& Goat& Fungi\\ Aquaticplants& Insects& Mushrooms\end{array}$$

1. 1 - Herbivores, 2 - Decomposers, 3 - Parasites

2. 1 - Producers, 2 - Consumers, 3 - Decomposers

3. 1 - Carnivores, 2 - Herbivores, 3 - Saprophytes

4. 1 - Decomposers, 2 - Producers, 3 - Consumers

Q.

A food chain in an ecosystem represents the __________________

1. energy flow and transfer of nutrients
2. abiotic components and decomposers
3. Biotic components only
4. Both (a) and (b)

Q. Regarding assertion and reason, choose the correct statement:
Assertion [A]: Marine ecosystems have lesser trophic levels than terrestrial ecosystems.
Reason [R]: Most of the phytoplankton is available for consumption and assimilation by primary consumers in aquatic ecosystems.

1. A is true and R is false
2. Both A and R are true and R explains A
3. Both A and R are true R does not explain A
4. A is false and R is true

Q. Which among the following contains chlorophyll?

1. 
   
   Algae

2. 
   
   Cuscuta
3. 
   
   Mango tree
4. 
   
   Mushroom

Q.

In the absence of light, green leaves turn into ___ colour.

1. Purple

2. Red

3. Orange

4. Yellow

Q. Match the following:
$$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ \text{A.}& \text{Fertiliser}& i& \text{Chlorophyll}\\ \text{B.}& \text{Algae}& ii& \text{Red pigments}\\ \text{C.}& \text{Variegated leaves}& iii& \text{NPK}\end{array}$$

1. A : i; B : ii; C : iii​
2. A : iii; B : ii; C : i​
3. A : i; B : iii; C : ii​
4. A : iii; B : i; C : ii​

Q.

Regarding assertion and reason, choose the right option.
Assertion [A]: Food webs are formed because of complex feeding relationships between organisms.
Reason [R]: Most organisms feed at one or more trophic levels in a food chain.

1. Both A and R are true and R explains A
2. Both A and R are true R does not explain A
3. A is true and R is false
4. Both A and R are false

Q.

Differentiate between the following:

Primary and secondary consumer

Q.

Which one of the following is a correct food chain?

1. Eagle → snake → grasshopper → grass → frog

2. Grass → grasshopper → frog

3. Grasshopper → grass → snake → frog → eagle

4. frog → snake → grasshopper → grass

Q.

Why plant have large and more vacuoles than animals?

Q. Match the organism to its trophic level in the food chain.

1. 
2. Third
3. 
4. First
5. 
6. Second

Q. Are carnivores primary consumers or secondary consumers?

Q. Match the following:
$$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ \text{A.}& \text{Fertiliser}& i& \text{Chlorophyll}\\ \text{B.}& \text{Algae}& ii& \text{Red pigments}\\ \text{C.}& \text{Variegated leaves}& iii& \text{NPK}\end{array}$$

1. A : i; B : ii; C : iii​
2. A : iii; B : ii; C : i​
3. A : i; B : iii; C : ii​
4. A : iii; B : i; C : ii​

Q.

Which of the following is true regarding decomposition of dead animals or plants?

1. Complex organic substances are converted into simpler inorganic substances.

2. Nutrients in the soil are absorbed by plants and decomposers.

3. Fertility of soil decreases gradually.

4. Complex inorganic substances are converted into simple organic substances.