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प्रश्न
The following statement is true or false :
Secondary consumers and tertiary consumers, both are carnivores.
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उत्तर
True.
APPEARS IN
संबंधित प्रश्न
State with reason any two possible consequences of elimination of decomposers from the Earth.
Give reason to justify the following: Flow of energy in a food chain is unidirectional.
The following statement is true or false :
In biology, human beings are called producers.
Which of the following belong to the same trophic level?
Goat ; Spider ; Plants ; Hawk ; Rat
Which of the following belong to the same trophic level?
Tree ; Frog ; Snake ; Grass ; Lizard
Fill in the following blank with suitable word :
Decomposer organisms are..........in their action.
Fill in the following blank with suitable word :
In nature, all green plants are............ whereas animals are consumers.
What is a trophic level?
Write down a food chain which ends with humans.
Which of the following represents a possible food chain found in a pond :
| Primary producers |
Primary consumers | Secondary consumers |
| (a) green algae | fish | mosquito larvae |
| (b) fish | green algae | mosquito larvae |
| (c) mosquito larvae | fish | green algae |
| (d) green algae | mosquito larvae | fish |
The sea water contains water beetles, tadpole, fish and weeds.
Which organisms in the food chain are herbivore, and carnivores?
With the help of a food chain, explain how biological magnification of harmful chemicals can occur.
In the food chain given below, if the amount of energy available at fourth trophic level is 5 kJ, what was the energy available at the producer level?
Grass → Grasshopper → Frog → Snake → Hawk
(a) 500 kJ
(b) 50 kJ
(c) 5000 kJ
(d) 5 kJ
An aquatic food chain comprises of the organisms like tadpoles, weeds, fish and water beetles. The organism which gets the minimum energy through this food chain is :
(a) water beetles
(b) tadpoles
(c) weeds
(d) fish
The harmful chemical which is accumulating in human beings through food chain is :
(a) benzenehexachloride
(b) dichlorodiphenyltrichloroethane
(c) chlorofluorocarbon
(d) abscisic acid
Observe the food web and answer the questions given below:
Why do all food chains start with plants?
______ obtained energy from the chemical breakdown of dead organisms.
Analogy:
Primary Consumer: Goat, Cow:: Secondary Consumer: ______.
Study the picture given below showing three food chains (a), (b) and (c) and answer the following questions:
- Name the type of ecosystems that exist in food chains (b) and (c).
- The first trophic level in all food chains is producers. Why? What percentage of solar energy do these producers capture for their use?
- Why are the arrows shown in the diagram in one direction only and not vice versa? Justify.
