1. in linnaeus's time, all living things were grouped into two kingdoms. later, there were five kingdomes, and now we have six kingdoms. what is the main reason for this increase in the number of kingdoms? (1 point)

I would say that first perhaps in Linnaeus's time there were mostly just the plant and animal kingdoms, but with time and with some key world explorations such as those of Von Humboldt and Darwin in South and Meso-America it became obvious that there were a plethora of types of plants and animals that could be divided on the basis of their particular physical characteristics, environment (land water or oceans for example and plains or mountains and different elevations and latitudes) so some more new types of kingdoms were introduced like mammals, fish, arthropods etc.