To which of the following do geologists primarily attribute the evolution of complex life forms on the planet? the formation of solid crust
Ο Ο
the increase in the atmospheric carbon dioxide
the formation of oceans
O
the increase in atmospheric oxygen

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.

i guess because there isn't enough love going around. < 3

hybridization actually occurs frequently in nature. evolution is derived from the process of hybridization that creates things with different traits. this leads to the species changing and evolution occurring. hope this : )