What is the functions of catalysts like enzymes

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 .

The picture shows a fishing technique called trawling. how might trawling affect marine biodiversity

"your temperature analysis reveals a pattern with coldest temperatures located to the portion of the map."