Identify an example of organisms that are free-swimming and bottom-dwelling forms.

Question

Question

This question was previously asked in

SSC CGL 2022 Tier-I Official Paper (Held On : 01 Dec 2022 Shift 2)

Answer 1

The correct answer is Zooplankton

Key PointsZooplankton:

Zooplankton is the common name given to many small species of animals found in fresh and marine waters throughout the world.
The word zooplankton, derived from Greek, means "wandering animals."
They float in the water column and drift with the currents. Most of these animals are so minute they are visible only with a microscope, although some species can reach lengths of eight feet.
Two general groups of zooplankton exist those that remain planktonic throughout their entire life (holoplankton), and those that are larval stages of larger life forms (meroplankton).
Some examples of zooplankton are Krill, jellyfish, Portuguese man o' war, squid, etc.

Important Points

Phytoplanktons:

Derived from the Greek words phyto (plant) and plankton (made to wander or drift), phytoplankton are microscopic organisms that live in watery environments, both salty and fresh.
Some phytoplankton are bacteria, some are protists, and most are single-celled plants.
Among the common kinds are cyanobacteria, silica-encased diatoms, dinoflagellates, green algae, and chalk-coated coccolithophores.