From the Aquatic Systems Below, Where are Heterotrophic Bacteria the Most

Question

From the aquatic systems below, where are heterotrophic Bacteria the most abundant?
A) marine coastal waters
B) deep sea
C) Sargasso Sea
D) open ocean

Accepted Answer

Heterotrophic bacteria are most abundant in marine coastal waters due to the high availability of organic matter from terrestrial runoff and coastal productivity, providing ample food sources for these organisms.