Question

An environmental engineer explains how nitrogen-fixing bacteria convert atmospheric nitrogen into forms plants can use. This process is essential for ecosystem productivity and food production. What does this reveal about prokaryotic ecological roles?
Question 5 options:

Prokaryotic organisms perform essential ecosystem services that support all life on Earth

Nitrogen fixation only occurs in laboratory settings, not in natural environments

Only eukaryotic organisms like plants and animals are important for ecosystem function

Prokaryotic organisms have no significant impact on ecosystem functioning

Answer 1

Correct answer: Prokaryotic organisms perform essential ecosystem services that support all life on Earth.

Reason: Nitrogen-fixing bacteria (prokaryotes) convert atmospheric N2 into bioavailable forms (ammonia, nitrates) that plants need, supporting primary productivity and food webs. This is an example of how prokaryotes drive nutrient cycling and other vital ecosystem functions.