In the early stages the embryos of four different species will look the same .For example, fish embryos and human embryos both have gill slits. In fish they develop into gills, but in humans they disappear before birth. That what makes them different.
Https://www.ncbi.nlm.nih.gov/pubmed/8300084
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Answer:
The allele frequency changed
The light moths blended in with the light-colored trees. However, the Industrial Revolution changed the tree colors. After the pollution from the Industrial Revolution started affecting trees, most of the collected peppered moths were of the dark form.
The answer is, How fast distant galaxies are moving away from us
Answer:
Gibberellins were extracted from <em>Bacteria</em>