What Is Food Chain

Q.

Secondary producers are:
(a) herbivores
(b) producers
(c) carnivores
(d) None of these

Q.

Which one of the following has the largest population in a food chain?
(a) Producers
(b) Primary consumers
(c) Secondary consumers
(d) Decomposers

Q. Which statement is true corresponding to the given food chain?
Grass $\to$ Rabbits $\to$ Snakes $\to$ Hawks

1. Each predator population has a greater biomass than its prey population.
2. Each prey population has a greater biomass than its predator population.
3. Each population is omnivorous.
4. Each level of food chain returns inorganic nutrients and energy to the producer.

Q.

What are the limitations of detritus food chain?

Q. Secondary consumers are

Q. Read the following statements (I - III) and select the correct statements related to the food chain?

I. Food chains can never occur independently in an ecosystem and various food chains are interconnected with each other forming an interlocked system known as the food web.
II. Grazing food chains and detritus food chains are linked to each other.
III. A food chain always starts with a living plant.

1. I and II
2. II and III
3. I and III
4. I, II and III
   

Q.

The plants or the producers which fix the solar energy constitute the

1. Second trophic level

2. Third trophic level

3. Fourth trophic level

4. First trophic level

Q.

In an aquatic ecosystem, the trophic level equivalent to cows in a grassland is

1. Zooplankton

2. Benthos

3. Phytoplankton

4. Nekton

Q. If 10, 000 J of energy is trapped at producer level, then how much energy will be available to the owl as food in the following chain?

1. .01 J
2. 1 J
3. 10 J
4. 100 J

Q. A food chain is a series of a population, which starts with producers. It is concerning with

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

Q.

If 30J of energy is trapped at producer level, then how much energy will be available to peacock as food in the following chain?

Plant $\to$ Mice $\to$ snake $\to$ peacock

1. 0.03J

2. 0.003J

3. 0.3J

4. 0.0003J

Q. Rewrite the following in their correct sequence in a food chain:-
(a) Snake $\to$ Grasshopper $\to$ Grass $\to$ Frog.
(b) Grass $\to$ Tiger $\to$ Deer.
(c) Snake $\to$ Peacock $\to$ Rat $\to$ Wheat.

Q. Which is a primary consumer?

1. Scavenger
2. Saprophyte
3. Carnivore
4. Herbivore

Q.

Secondary producers are

(a) Herbivores

(b) Producers

(c) Carnivores

(d) None of the above

Q.

The passage of materials from producer through primary, secondary, tertiary or quaternary consumers is known as __________.

Q. The process where a population inhibits the growth of other population without affecting itself is known as:

1. Amensalism
2. Parasitism
3. Commensalism
4. Mutualism

Q. reperesents the feeding relationship and energy flow in an ecosystem.

1. Food chain
2. Stratification
3. Mineralisation
4. Nutrient cycling

Q. Primary consumers in detritus food chain are

1. Bacteria and fungi
2. Herbivores
3. Insect larvae, nematodes
4. All of the above

Q. Which of the following is correct with respect to an ecosystem?

1. Primary consumers are least dependant on producers
2. Primary consumers always outnumber the producers
3. Producers are more than primary consumers
4. Secondary consumers directly depend on producers

Q. A food chain in an ecosystem represents the

1. feeding relationship
2. stratification
3. ecological succession
4. energy flow

Q. This is a typical food web in a pond.

1. Bass and minnows
2. Minnows and sunfish
3. Frogs and sunfish
4. Bass and algae
5. Frogs and algae

Q. The food chain in which microbes breakdown, energy rich compounds, synthesized by producers is called as ................

1. Ecosystem
2. Parasitic food chain
3. Detritus food chain
4. Predator food chain

Q.

Secondary producers are

(a) Herbivores

(b) Producers

(c) Carnivores

(d) None of the above

Q. Which one is detritus food chain?

1. Grass, Insects, Snakes
2. Organic matter, Bacteria, Molluscs
3. All of the above
4. Plankton, Small fish, Large Fish

Q. In a grassland ecosystem, if the number of primary producers is approximately 6 million plants, the number of top carnivore, which may be supported by it may be....................thousand.

1. 30
2. 60
3. 6
4. 3

Q. Which of the following is correct with respect to an ecosystem?

1. Primary consumers are least dependant on producers
2. Primary consumers always outnumber the producers
3. Producers are more than primary consumers
4. Secondary consumers directly depend on producers

Q. Which of the following is correct with respect to an ecosystem?

1. Secondary consumers are the largest and most powerful
2. Primary consumers are least dependant on producers
3. Primary consumers outnumber produces
4. Producers are more than primary consumers

Q. Which of the following statements are correct with respect to food chains in an ecosystem?
I) Removal of 80% of tigers from an area will result in an increased growth of vegetation.
II) Removal of most of the carnivores will result in an increased population of deers.
III) The length of food chain is generally limited to 3 - 4 trophic levels in an ecosystem.
IV) Topmost trophic level possess the maximum energy.

1. I and II
2. II and III
3. I and IV
4. III and 1V

Q. reperesents the feeding relationship and energy flow in an ecosystem.

1. Food chain
2. Stratification
3. Mineralisation
4. Nutrient cycling

Q. A detritus food chain begins with

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