Plankton
Plankton is the mass of mostly microscopic organisms that float or drift freely in freshwater and marine environments and Nekton are all organisms the swim actively in open water, independent of currents.
Yes :) they are most common in marine environments though
Annelids live in the ground, in freshwater, and in marine environments.
Paramecium uses the processes of endocytosis and exocytosis. Paramecia are single-celled organisms that can be found in freshwater, brackish and marine environments. They grow in big numbers in stagnant basins and ponds.
A marine biologist studies the plants and animals found in marine environments. They also look at the way these organisms react with their environment.
the answer is phytoplankton or plankton
Flagellates are a diverse group of single-celled organisms belonging to various phyla, including the phylum Euglenozoa and phylum Dinoflagellata. These organisms possess whip-like structures called flagella that they use for movement. Flagellates can be found in diverse environments such as freshwater, marine, and soil.
They use the oxygen from the water and must remain in constant motion to obatin it.
nektonThe collection of marine and freshwater organisms that can swim freely and are generally independent of currents, ranging in size from microscopic organisms to whales.
In sea water it's a marine biologist. If the water is fresh it's just a freshwater biologist.
The paramecium and euglena belong to the Kingdom Protista. This kingdom is composed of single-celled organisms that have characteristics of both plants and animals. Protists are primarily aquatic and can be found in various freshwater and marine environments.
freshwater,estuarine,and marine! -ash (: