Answer Happy

QUESTION 35 Genomic evidence shows that Homo sapiens contains DNA from Neanderthals. If they interbred with Homo sapiens, why aren't Neanderthals considered to be members of the same species as Homo sapiens? O Interbreeding happened only once between these species. The hybrids were usually sterile so the species are considered separate. O Neanderthals and Homo sapiens maintained their morphological identities despite interbreeding O Neanderthals and Homo sapiens maintained their cultural identities despite interbreeding. O Not enough time had elapsed for post-zygotic barriers to mating to have evolved. QUESTION 36 Bipedalism among primates first evolved in the genus Homo. O True O False QUESTION 37 Why are rates of phenotypic evolution seen living organisms typically many orders of magnitude greater than those observed in the fossil record? O Standing genetic variation increases over time, so it is greater in living species than fossil species O Studies of fossils often span only a few generations so change is based mainly on standing genetic variation, whereas studies of living organisms can span thousands of generations so standing variation has been "used up" and change requires new mutations. O Studies of living organisms often span only a few generations so change is based mainly on standing genetic variation, whereas studies of fossils can span thousands of generations so standing variation has been used up" and change requires new mutations. O Fluctuating environments maintain heritability. O Rapidly changing features are rarely preserved in the fossil record.