Minutes plants and animals, collectively known as plankton, grows when they are exposed to sunlight and food which correction should be made

The first correction should be that the first word, minutes, is capitalized and the s at the end is removed, because the word minute is an adjective used to describe something that is very small, while the word minutes is the plural form of the word minute, which is a unit of time amounting to 60 seconds. The second is that in the the word grows, the s at the end must be removed as the subject, plankton, is plural.

8 ish depending on the what grade