What is a food web?
Important Questions on Our Environment
The following figure represents the flow of energy in a pyramid of food. If this ecosystem receives 100000 kcal of sunlight energy of the energy finally available to Tertiary Consumer (TC) is:
Give reason:
Food chains generally consist of only three or four steps.
a) Given below are some organisms. Arrange all of them in a food chain and show the direction of the flow of energy.
Eagle, grasshopper, frog, grass, snake.
b) Which of the organism in the above food chain has maximum amount of energy ?
c) Give an example of artificial ecosystem.
Which of the following constitute a food chain?
An illustration of a pyramid of a number of an aquatic ecosystem is given.
The pyramid of energy for the same ecosystem would be:
Attempt the following:
(i) Construct a Food Chain with the help of the organisms given below:
Hawk, Grass, Snake, Hen.
(ii) Why is it not advisable to have a six-step food chain?
(iii) If Pesticides enter the above food chain.
(a) In which organism will it be found in the maximum amount?
(b) What is this phenomenon called?
A food chain in a polluted aquatic ecosystem is given. Observe it and answer the following questions.
Freshwater Algae Fishes Birds.
(i) Which organisms are disturbed more due to biomagnification? Why?
(ii) This ecosystem will be destroyed gradually due to biomagnification. Why?
Find the names of two herbivorous, two carnivorous and two omnivorous animals in the word grid below.
Explain the following with suitable examples.
What type of changes occurs in the amount of energy during its transfer from plants to apex consumers?
