Question

Below are the recorded observations from a student's notebook: a test tube is filled with pond water rich with protists like euglena. A piece of dark paper is wrapped around the bottom of the test tube and the top of the test tube becomes green, rich with algae. Based on these observations, which question could be answered?

Answer 1

hi there im not trying to answer but i need help with my homework

i woould love to hlpe you but i am really dumb i dont know the asnwer