Question

freshwater lakes have distinct zones of biological communities. these zones are based on the availability of resources linked to the structure of the lake. which of the following best characterizes the limnetic zone of a lake? choose 1 answer: a it is composed of open water and dominated by plankton. b it primarily contains organisms that are able to survive in low - oxygen concentrations. c because it receives enough sunlight and nutrients, it supports communities of rooted plants. d it is the land - based community of organisms and their environment not associated with water.

Explanation:

The limnetic zone of a lake is the open - water area away from the shore. It is well - lit and contains mainly plankton, which are free - floating organisms. Option B describes the hypolimnion (lower layer with low oxygen). Option C describes the littoral zone (near - shore with rooted plants). Option D describes a terrestrial community, not a lake zone.

Answer:

A. It is composed of open water and dominated by plankton.