In hamsters the allele for a brown coat color (B) is dominant over the allele for a tan coat color (b). If a tan hamster is crossed with a heterozygous brown hamster, which of the following genotypic ratios can be expected? a) 1 BB: 2 Bb: 1 bb
b) 2 BB: 0 Bb: 2 bb
c) 0 BB: 2 Bb: 2 bb
d) 2 BB: 1 Bb: 0 bb

Sediment layers stop lateral spreading when: they encounter a barrier they encounter an opposing current they run out of additional sedimentary material

Zoo geographic regions are characterized by the presence of specific groups of animals these regions are determined by the taxonomic or phylogenetic relationships of animals. the map shows the zoogeographic regions proposed by the naturalist alfred russel wallace in 1876. the similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between the organisms in both locations ?

There are fewer than 100 naturally occurring elements in the universe, but there are millions of different unified substances. explain how this can be true.