Which of the following choices did Wegner give as evidence for continental drift? a) Fit of continents, rock sequences, glacial evidence
b) Identical fossil species on different continents (both plant and animal), Antarctic climate changes
c) Sea-floor spreading, mid-ocean ridge, and trenches
d) a and b only

Cattle with brown fur and cattle with white fur will produce a reddish roan calf . when examined closely, the calf show about an even number of brown hairs and white hairs that give a reddish appearance when viewed from far away. the fact that both the brown fur allele and the white fur allele are expressed equally in the offspring is an example of