Advertisements
Advertisements
प्रश्न
Most of the water surface of a lake is covered with algae. This algae is part of the food chain which also includes small fish, bird, larvae and big fish. Which of the following will obtain the maximum energy?
(a) big fish
(b) bird
(c) larvae
(d) small fish
Advertisements
उत्तर
larvae
Larvae feed on algae for their nutrition, so they get the energy they require directly from the producers. Thus, they get the maximum energy among all the consumers.
APPEARS IN
संबंधित प्रश्न
In a food chain of frog, grass, insect and snake, assign trophic level to frog.
The first trophic level in a food chain is always a green plant. Why ?
List two important roles play in the environment by decomposers.
What is biological magnification?
In the following food chain, 20,000 J of energy was available to the plants. How much energy would be available to man in this chain?
Plants → Sheep → Man
What are planktons?
The following statement is true or false :
In biology, human beings are called producers.
Fill in the following blank with suitable word :
Decomposer organisms are..........in their action.
What is the role of decomposers in the ecosystem?
In a food chain, the third trophic level is always occupied by :
(a) carnivores
(b) herbivores
(c) decomposers
(d) producers
A food chain occurring in the sea which provides food for many people can be written as :
phytoplankton → zooplankton → X → Y
Which organism in the above food chain is a (1) primary consumer, and (2) tertiary consumer?
Why are there rarely more than five links (or five organisms) in a food chain?
Name two predators of snakes in a food web operating in a forest ecosystem.
Fill in the following blank with suitable word :
Grass → ........... → Human
A food chain comprises of cat, seed-eating bird, plants, and dog. The organism which will have the maximum concentration of harmful pesticides coming through the food chain is most likely to be :
(a) cat
(b) plants
(c) dog
(d) seed-eating bird
Observe the food web and answer the questions given below:

Why do all food chains start with plants?
Natural agents like ______ are the decomposition factors breaking complex forms into simpler units.
If a harmful chemical enters a food chain comprising peacocks, plants, rats and snakes, which of these organisms is likely to have the highest concentration of the chemical in its body? Justify your answer. Name the process involved and define it.
Quaternary consumers are described as:
