Articles > Lotic Communities & Animals – Quiz Lotic Communities & Animals – Quiz Quiz Choose the best answer. 1. Small habitats within a larger habitat are called (biomes / microhabitats). 2. Immobile animals that remain attached to a substrate are referred to as (sessile / free-living). 3. Microscopic organisms floating in freshwater habitats are referred to as (plankton / nekton). 4. (Body flattening / Streamlining) enables less resistance to drag when an animal attempts to move. 5. (Suckers / Hooks) enable animals to latch onto another animal. Send Your Results (Optional) Your Name To Email Time is Up!