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 _____
Exact Match is the Google AdWords keyword match type that allows you to show your ad when a searcher types the exact word or phrase you are bidding on. An Exact Match keyword in Google AdWords will only enter an auction in which the search query perfectly matches or is a close variant of your keyword.