Multiple choice

In an aquatic environment, microscopic animals and plants are collectively known as

  1. commensales

  2. herbivores

  3. fauna and flora

  4. planktons

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Plankton is the collective term for microscopic organisms floating in aquatic environments. It includes both phytoplankton (plant-like) and zooplankton (animal-like), making it the correct answer. The other options are incorrect: commensales describes a symbiotic relationship, herbivores are plant-eating animals, and fauna and flora refers to larger animals and plants rather than microscopic organisms.