Many years of evolution is most likely to produce
a) species that are most likely to become extinct
b) species that are becoming more and more similar
c) decreasing numbers of species in each environment
d) differences between species and their ancestors

D) differences between species and their ancestors

This is because of the adaptive mechanism and mutations the organisms have to respond to. Adaptation processes occur to help species survive and thrive in the ecological balance of life. Structural adaptations are physical features of an organism that adapted through time. An example of this are the bills of a bird and the fur of bears that they generally need for their survival; birds for hunting, and bears to protect them from low climate areas.