Question

common patterns of embryo development
direct observation of evolution through artificial selection
shared characteristics among living organisms
biogeographic evidence
similarities and differences in dna
fossil evidence
dolphin embryos show early development of hind limb buds.
toothed whales and baleen whales share a mutation in the tas1r2 gene, losing their sweet taste perception. hippos, the closest living whale relatives, have a functioning tas1r2 gene.
humans choose small, nonaggressive porpoises for captive breeding, and captive porpoises are smaller and friendlier than wild populations.
ear bones of extinct indohyus resemble those of early and modern whales.
fossils of early whales such as pakicetus, which lived in rivers and lakes, have limited distribution, while fossils of ocean - dwelling whales are much more widely distributed.
sperm whales, orcas, and belugas all have similar ear bones for reception of high - frequency sounds.

Explanation:

The text presents various types of evidence for evolution like embryo - development, gene mutations, artificial selection, fossil records etc. These are key concepts in evolutionary biology.

Answer:

Evidence for evolution in whales and related species.