Food Chain

Q. Give an example of aquatic food chain.

Q.

In the given food chain, suppose the amount of energy at the fourth trophic level is 5 kJ, what will be the energy available at the producer level?

Grass → Grasshopper → Frog → Snake → Hawk

1. 5 k J

2. 50 k J

3. 500 K J

4. 5000 K J

Q.

Differentiate between consumers and decomposers.

Q.

The correct sequence of food chain is:

1. 
2. 
3. 
4. 

Q.

Which part of a food chain is affected by one animal becoming extinct?

1. The whole food chain is affected.

2. Only animals at the top of the food chain are affected.

3. Only plants and animals at the bottom of the food chain are affected.

4. Producers and decomposers are affected.

Q.

Which of the following is/are correct with respect to food chains in an ecosystem?
I) Removal of 80% tigers from an area resulted in an increased growth of vegetation.
II) Removal of most of the carnivores resulted in an increased population of deer.
III) The length of the food chain is generally limited to 3 - 4 trophic levels in an ecosystem.
IV) The length of food chains may vary from 2 to 8 trophic levels.

1. C and D
2. A and D
3. B and C
4. A and B

Q. Which organisms are consumers?

1. Rabbit
2. Giraffes
3. Bear
4. All of the above

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

1. decomposers
2. herbivores
3. producers
4. carnivores

Q. What are apex predators? Give examples.

Q.

Food chain is a series of organisms, each becoming a food source for the next.

1. False

2. True

Q.

Give one word for energy transfer from producers to herbivores to carnivores in an ecosystem.

Q.

Mention if the following statements are true (T) or false (F).​

​(a) Snakes are primary consumers.

Q.

By taking the example of snakes, explain how by killing small animals, we are actually harming ourselves.

Q. _________ are at the bottom of water reservoirs. They decompose dead bodies of plants and animals convert into abiotic factors.

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

Q. Sort the organisms to form a food chain. (top to bottom)

1. Grass
2. Grasshopper
3. Frog
4. Snake
5. Eagle

Q. A food web is formed by ___

1. Interconnections of nutrient cycles
2. Interconnections of different species
3. Interconnections of different food chains
4. Interconnections of different ecosystems

Q. Match the following​:

Column I			Column II
Grass	a	1	Carnivore
Deer	b	2	Decomposers
Cobra	c	3	Primary consumers
Vulture	d	4	Autotroph
Microbes	e	5	Scavengers

Q. Living organisms depend on each other for their food requirement and form a chain this is termed as

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

1. herbivores
2. carnivores
3. decomposers
4. producers

Q.

The indiscriminate killing of which of the following animals can lead to the loss in the production of food grains?
(a) birds
(b) snakes
(c) grasshoppers
(d) rats

Q. Very Short Answer Type Questions :
What do you understand by the term food chain?

Q. All organisms that feed at each other link in a food chain comprise a ______.

1. food pyramid
2. energy pyramid
3. trophic level
4. calorie
5. biomass

Q. What are apex predators? Give examples.

Q.

Rewrite following in correct sequence.

Grains→ Owl→ Rat

Q.

Identify the type of food chain:
Dead animal $\to$ Blowfly maggots $\to$ Common frog $\to$ Snake

1. Grazing food chain

2. Detritus food chain

3. Decomposer food chain

4. Predator food chain

Q. feed on the dead organisms of all the trophic levels.

1. Producers
2. Consumers
3. Decomposers

Q. Which of the following can be an apex consumer?

1. Rabbit
2. Cow
3. Fish
4. Kingfisher

Q. Who competes for spiders?

1. Herbivorous insects and toads
2. Mice and plants
3. Toads and rabbits
4. Insectivorous birds and predaceous insects

Q. Sequence of species through which organic of food passes in a community is called

1. Food chain
2. Ecosystem
3. Population
4. Ecological pyramid

Q. What is the biological significance of golden rice production?