Archaeoptryx was discovered two years after Darwin published On the Origin of Species. Archaeoptryx had a long, bony tail like dinosaurs, broad wings and feather like birds, and skeletal features of both. What best describes this evidence?

What can be inferred from the following statement? The protein cytochrome c is found in all aerobic organisms.

A scientist uses DNA from a prehistoric bird to compare with modern bird DNA. What evidence is being used to compare relatedness?

Whales live in the water and have no hind limbs. However, the ancestors of this baleen whale lived on land, helping to explain the existence of the whale’s pelvic bone, labeled with the letter P.

The table shows the number of differences between the amino acid sequence in the hemoglobin molecules of several different species compared with the amino acid sequence in human hemoglobin. Using this data, which organism is most related to humans?

Responses

A researcher in the Amazon jungle recently found an unknown species of fern. She compared it to four known fern species that grow in the same area. Her results are shown in the table. The unknown species is most similar to which known species?