It is a mass of 14 (brainlist me pls)
a chemical element or substance required in trace amounts for the normal growth and development of living organisms.
They are called
a. sunspots
Plant-like protists produce almost one-half of the oxygen on the planet through photosynthesis. Other protists decompose and recycle nutrients that humans need to live. ... Humans use protists for many other reasons: Many protists are also commonly used in medical research