If you see a fossil fish in a museum that is labeled one of the earliest fish known, what era is it probably from? a. paleozoic c. mesozoic b. cenozoic d. precambrian

I think it is from the Paleozoic era

Hope this helps

This is what i found on google “phytoplankton, tiny organisms that live in the ocean, are autotrophs. some types of bacteria are autotrophs. most autotrophs use a process called photosynthesis to make their food.” i hope this you for what your looking for