Plants grow naturally towards the strongest source of light, this is called phototropism. They do this in order to maximise their exposure to the sun and increase the amount of photosysnthesis (and therefore growth). This is a survival mechansim.
researcher will either use random assignment or matching What do random assignment and matching have in common? They are both designed to create equivalent groups of participants. Random assignment is to random selection as _____ is to _____
There are a lot of different methods; the only requirement is that every subject has an equal chance to be in the experimental group. Drawing names out of a hat or creating a lottery are ways to make assignment to the experimental group random.