Which of the following types of organisms occupies more than one trophic level in a pond ecosystem?
Phytoplankton
Fish
Zooplankton
Frog
The Correct Option is B
Solution and Explanation
The Correct option is B: Fish.
In an aquatic ecosystem, fish can consume phytoplankton and other producers. In this context, fish act as primary consumers or herbivores in the grazing food chain. Some larger fish may also prey on smaller fish. Phytoplankton are always producers, while zooplankton are always primary consumers. Frogs function as secondary consumers, feeding on primary consumers such as insects.
Thus, the correct answer is option B.
Top Questions on Ecosystem
- Why are restrictions imposed on MTP in India? Up to how many weeks or trimesters, is MTP considered relatively safe for a female, if necessary to perform, by a medical practitioner?
Read the passage given below and answer the question.
Food chains ‘P’ and ‘Q’ form an interconnection. ‘P’ initiates with wheat grass whose population supports a few grasshoppers, frogs and snakes.
‘Q’ starts with dead decaying leaves of wheat grass which are eaten by earthworms and then food chain is continued with frog of food chain ‘P’.
Identify the types of food chains ‘P’ and ‘Q’:
Study the table given below showing the relationship between organism, its trophic level and kind of food chain it belongs to.
Student to attempt either option (A) or (B).
(A) Identify the type of pyramid given below and write two identifying features of such a pyramid:
OR
(B)
(i) Construct an ideal pyramid of energy when 10,00,000 Joules of sunlight is available.
(ii) Mention the energy obtained by the fourth level of this pyramid.}
- Analyse the following ecosystems and discuss, which will be more productive in terms of primary productivity:
A young forest, a natural old forest, a shallow polluted lake.