Which trait of particles causes even cold objects to have some thermal energy?
kinetic energy
equilibrium
momentum
constant random motion
Scientists think that multicellularity arose from cooperation between many organisms of the same species. The Colonial Theory proposes that this cooperation led to the development of a multicellular organism. Many examples of cooperation between organisms in nature have been observed. For example, a certain species of amoeba (a single-celled protist) groups together during times of food shortage and forms a colony that moves as one to a new location. Some of these amoebas then become slightly differentiated from each other. Volvox, shown in Figure above , is another example of a colonial organism. Most scientists accept that the Colonial theory explains how multicellular organisms evolved.