Ascientist conducts an experiment to test the effects of light on earthworm activity. which is a variable in this experiment?

How many species of living things are alive on earth today? more than 1,000,000 none of these answers are correct 100-500 1,000 –500,000 o 500,000 -1,000,000

Which of the following describes the difference in stimuli required to detect a difference between the stimuli? a. just noticeableb. signal detectionc. subliminald. top down

What goes in and out of a cell respiration?