One diploid cell > four haploid cells
the structure of the earths crust or surface.
Dobzhansky and Mayr thought that the evolution of a new species is linked to the environmental changes. Geographic isolation happens before speciation and isolated populations evolve differences gradually as they adapt to the environment are the ideas that would follow the Dobzhansky-Mayr theory of speciation.
In measuring perceptions of a stranger, people choose to use some trait adjectives such as warm,friendly and caring rather than talkative,clean and detail-oriented for the reason that the former words are more pleasing to hear and most commonly used positive words for encouragement.