Q. Consider the following statements regarding an aquatic ecosystem:
(1) The shallow water zone around the edge of the lake is the littoral zone.
(2) Limnetic zone is the open zone where phytoplankton grows in abundance.
(3) Profundal zone is the dark zone where the light cannot reach.
Which of the statements given above is/are correct?
a) 1 only
b) 2 and 3 only
c) 1 and 3 only
d) 1, 2 and 3
Question from Odisha OCS Paper 1 2024
The correct answer is: d) 1, 2 and 3.
Explanation:
1. The littoral zone is indeed the shallow water zone around the edge of a lake. It is the area where sunlight penetrates to the bottom, allowing aquatic plants to grow. This makes statement 1 correct.
2. The limnetic zone refers to the open water zone in a lake, away from the shore, where sunlight can penetrate. This zone supports the growth of phytoplankton, which are microscopic plants that perform photosynthesis. This makes statement 2 correct.
3. The profundal zone is the deep, dark zone of a lake where sunlight cannot reach. As a result, photosynthesis does not occur here, and it is typically inhabited by organisms adapted to low light and oxygen levels. This makes statement 3 correct.
Since all three statements are correct, the correct answer is option d) 1, 2 and 3.
