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 _____
A matching in a graph is a sub set of edges such that no two edges share a vertex. The maximum matching of a graph is a matching with the maximum number of edges. This is very difficult problem. We study only maximum matching in a bipartite graph. In a bipartite graph the vertices can be partition into two disjoint sets V and U, such that all the edges of the graph have one end point vertex in U and the other end in V. Example of bipartite graph: boys and girls that will dance with each other.