However, certain wasp species such as pollen wasps have similar behaviours, and a few species of bee scavenge from carcases to feed their offspring. The world's largest species of bee is thought to be the Indonesian resin bee Megachile pluto, whose females can attain a length of 39 millimetres (1.54 in).
For a Ph.D. in Psychology: Most Ph.D. programs require at least 5 to 7 years to complete. In addition to regular coursework, you may also be expected to complete an internship or supervised residency. The program usually culminates in completing an original research project or dissertation.
âTo finish a PhD degree takes anywhere from three to five years, sometimes more, depending on the program,â says Dr. Rafael Matos, a graduate of Walden Universityâs online PhD program in psychology. If time and convenience are concerns to you, an online PhD program might be a viable option.