Advertisements
Advertisements
Question
One of the following is not a consumer. This one is :
(a) giraffe
(b) antelope
(c) algae
(d) alligator
Advertisements
Solution
algae
Algae are producers, which prepare their food themselves through photosynthesis. They are not consumers.
APPEARS IN
RELATED QUESTIONS
Give reason to justify the following: Flow of energy in a food chain is unidirectional.
List two biotic components of a biosphere.
What are the various steps of food chain called?
Name one decomposer.
Consider the food chain :
Grass → Deer → Lion
What will happen if all the lions are removed from the above food chain?
Write a common food chain of a pond ecosystem having four links.
In a food chain, the initial organism is usually :
(a) photosynthetic
(b) herbivore
(c) saprophytic
(d) parasitic
In a food chain, the third trophic level is always occupied by :
(a) carnivores
(b) herbivores
(c) decomposers
(d) producers
The sea water contains water beetles, tadpole, fish and weeds.
Write a food chain comprising all the given organisms.
A food chain occurring in the sea which provides food for many people can be written as :
phytoplankton → zooplankton → X → Y
Name two zooplanktons.
The following statement is true or false :
Only 10 per cent of the light energy given by the sun is available for transfer at each higher trophic level in a food chain.
Fill in the following blank with suitable word :
Lettuce → ............. → Fox
What is meant by bioconcentration of pesticides
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 surface of water in a lake appears green due to a layer of tiny free-floating organisms X on its surface. The lake water also contains organisms like water beetle, fish and tadpole. The sun shines over the lake water and provides energy for the functioning of this lake ecosystem.
(a) What could organisms X be?
(b) Write a food chain comprising of all the four organisms mentioned.
(c) What is the general name of the food chains like the one written above?
(d) Name (i) secondary consumer (ii) producer (iii) tertiary consumer, and (iv) primary consumer, in the above food chain.
(e) If the tertiary consumer gets 0.2 J of energy from the secondary consumer, then how much energy was radiated by the sun to the producer?
A food chain consists of fish, larvae, phytoplanktons and birds. The level of pesticides in water in which the fish, larvae and phytoplanktons live is quite high.
(a) In which organisms the pesticides enter from the polluted water? What is this level of organisms known as?
Write the importance of the food chain.
In an ecosystem, herbivores represent ______.
Which of the following is a logical sequence of food chain?
Use of several pesticides which results in excessive accumulation of pesticides in rivers of ponds, is a matter of deep concern. Justify this statement.
