Evidence of Evolution

In this diagram, called a phylogenetic tree, which letter represents the most recent common ancestor between humans and gorillas? (Hint: where do humans and gorillas intersect?)

Which statement is true about the fossil record?

The evolution of these insects is an example of what type of evolution?

This diagram of a portion of the fossil record shows what type of evolution?

Which type of structure is derived from (comes from) having a common ancestor?

Which is an example of a vestigial structure, which has no apparent use in the modern organism?

This image shows the embryos of four species at similar stages in development. Which two species are most closely related?

Hemoglobin is a protein that helps red blood cells carry oxygen. Similarities in the amino acid sequence of the hemoglobin protein of different species provide evidence for their relatedness.

The chart shows the percent similarity of the amino acid sequence of this protein between humans and other species. Which of the following species is the LEAST closely related to humans?

All mammals are considered to have evolved from a common ancestor that lived 180 million years ago. Mammal limbs (arms, legs, wings) are similar in the number of bones they share and the arrangement or order of these bones. What type of homology is this?

Organisms that are more closely related show similarities in their embryos during development. What type of homology is this?

Which of the following is an example of a molecular homology between species?