In an experimental investigation, the variable that the researcher changes or manipulates in order to see its effects is called the (blank) variable.

Choose the molecule that is described by each phrase. energy used during long activities:

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 .

Drag the tiles to the correct boxes to complete the pairs. match the nitrogenous base of dna with its complement.