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 _____
Lesson Summary. A matched-pairs design is a type of randomized block design that has two treatment conditions and pairs subjects based on common variables. A block design is one in which an experimenter distributes the subjects of a study into smaller subgroups that have common variables.