The chart below shows a feeding relationship in a certain ecosystem.

(a) Construct two food chains ending with a tertiary consumer in each case.
(b) Which organism has the largest variety of predators in the food web?
(c) Name secondary consumers in the food web.
(d) Suggest three ways in which the ecosystem would be affected if there was a prolonged drought.

Answer:

a)
-Green plants-Grasshoppers-Lizards-Domestic Cats.
-Green plants-Mice-Snakes-Hawks
-Green plants-Mice-Snakes-Domestic Cats
b)
-Mice
c)
-Lizards, Domestic Cats, Hawk, Snakes.
d)
-Most plants will die.
-Some organisms may starve to death.
-Some organisms may migrate in search of food and shelter.

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