The phenomenon of fusion is likely to occur when, after a period of geographic isolation, two populations meet again and
A) their chromosomes are no longer homologous enough to permit meiosis.
B) a constant number of viable, fertile hybrids is produced over the course of generations.
C) the hybrid zone is inhospitable to hybrid survival.
D) an increasing number of viable, fertile hybrids is produced over the course of generations.
E) a decreasing number of viable, fertile hybrids is produced over the course of generations.
Mutualisms, such as those that occur among plants and pollinators, generally involve large numbers o
The Black Death spread over much of Europe in a three-year period in the middle of the fourteenth ce
Bone fractures that occur before death show signs of healing. The process of fracture healing starts
Anthroposphere Quarterly Period
End of last glacial period
Embryonic Period - By the second day after fertilization