What are the ways by which organisms disrupt earth's natural balance?

After getting the slide and microscope ready, stella is eager to see the microscopic pond water specimen! she crouches around her microscope and aligns her eye with the microscope’s eyepiece. but she's only able to see a bright white light. at this point, no specimens or cells are visible on stella's pond water slide. after taking a moment to collect her thoughts, stella realizes she can't see any lifeforms because .

Hey me with this one❤❤❤❤ every organism needs food. does a cell also need it? explain very briefly.

One gene can influence trait(s). one trait can be determined by gene(s).