Why does gene flow prevent speciation?

Which is a genetic engineering advancement directly related to a career in biotechnology? 1) improving solar energy collection 2) transporting textiles at higher rates 3)creating crop foods that resist insect pests 4)repairing historical sites with quality materials

If all prokaryotes on earth suddenly vanished, which of the following would be the mostlikely and most direct result? a) the number of organisms on earth would decrease by 10—20%.b) human populations would thrive in the absence of disease. c) bacteriophage numbers would dramatically increase. d) the recycling of nutrients would be greatly reduced, at least initially. e) there would be no more pathogens on earth.

How is the object related to your skeletal system?