Freshwater protists with two flagella that can be photosynthetic or heterotrophic are called
a. amoebas.
b. ciliates.
c. dinoflagellates.
d. euglenoids.

The correct answer should be euglenoids. This means that they can both produce food on their own using sun because they have chloroplasts and do photosynthesis, and they can feed on food produced by others if need be or if there's no exposure to sunlight. They are also known as Euglena and are very recognizable due to the whip that they have.

Bookpagechapter letter sentence word1

When a virus infects a host cell, it uses the cell's machinery to make copies of its own genetic material in a process called replication. finally, during the process of self-assembly, that protein shell and the copies of the virus's genetic material are assembled into new viruses.