Food Chains and Trophic Levels

Q.

In the food chain given below, grasshopper occupies the _____ trophic level.

Grass→Grasshopper→Frog→Snake→Eagle

1. Third

2. Fourth

3. First

4. Second

Q. Which of the following comprises the standing crop of an ecosystem?

1. Both (a) and (b)
2. Total nutrients present in the crop
3. Total living material
4. Total detritus

Q.

What is the significance of food chain?

Q. The second trophic level in a food chain is occupied by _______.

1. Herbivores
2. Decomposers
3. Carnivores
4. Producers

Q. Fungi is an example of a _____.

1. producer
2. consumer
3. decomposer
4. carnivore

Q.

An organism that attacks, kills, and feeds on other animals is called a

1. predator

2. saprophyte

3. Parasite

4. prey

Q.

What are Benthos?

Q.

In the following food chain, energy flows from

Grass→Grasshopper→Frog→Snake→Eagle

1. Grass to Eagle

2. In all directions

3. There is no energy flow

4. Eagle to Grass

Q.

A single organism cannot be involved in more than one food chains

1. True

2. False

Q.

All the feeding relationships in an ecosystem can be represented by a:

1. Food chart

2. Food tree

3. Food graph

4. Food web

Q.

Calculate the amount of energy available to the organisms at the fourth trophic level if the energy available to the organisms at the second trophic level is 2000 J.

Q.

The third trophic level is occupied by the

1. decomposers

2. autotrophs

3. herbivores

4. carnivores

Q.

What is the trophic level of herbivores and consumers in the food chain?

Q.

With respect to the given example of a food web, which level of the consumers does the bear belong to?

1. Primary consumer
2. Both A and B
3. Secondary consumer
4. Primary, Secondary and Tertiary consumer

Q.

Which of the following are the characteristics of tertiary consumers?

1. Pointed claws

2. Carnivorous

3. All of the above

4. Sharp canines

Q.

The energy of the sun is captured by the plants and is transferred to other organisms through a ______

1. food chain

2. respiratory system

3. ecosystem

4. photosynthetic reaction

Q.

Identify the error(s) in the given statements:

Biotic components include soil, rocks, air, water, light and temperature.

Q.

In the following food chain, which organism has the highest energy level?

Grass→Squirrel→Fox→Lion

1. Lion

2. Fox

3. Squirrel

4. Grass

Q.

Which of the following is true for parasitism?

1. Beneficial to both the organisms

2. Beneficial to one and harmful to another

3. Parasite becomes the food for the host

4. Parasite derives nutrition from the host

Q.

Can any food chain be complete without plants?

Q.

Ecosystem for hibiscus.

Q.

Why are algae placed in the first place of the food chain?

Q.

Which of the following organisms can synthesise their own food?

1. Plants

2. Cyanobacteria

3. Animals

4. Amoeba

Q.

An organism that attacks, kills, and feeds on other animals is called a

1. saprophyte

2. Parasite

3. prey

4. predator

Q.

One organism can represent different trophic levels.

1. False

2. True

Q.

How do our lifestyle and attitude affect the environment? Explain with suitable examples.

Q.

The process through which plants prepare their own food is called __

Q.

All the interacting organisms in an area together with the non-living constituents of the environment form an ______________.

Q.

Algae → Dragonflies → Fishes → Otters.

In the given aquatic food chain, which organism occupies the bottom position?

1. algae

2. dragonflies

3. fishes

4. otters

Q. How is increase in population having an adverse effect on ecosystem?