Embryology - Evidence for evolution

In stage one (top row) of these embryos, most of the embryos________

• look very similar.

• show different stages of development.

• have very different features.

• Have only a tail if they are non-human

In the the third embryonic stage (bottom row), mammal embryos _____

• are still hard to tell from reptiles and birds.

• all lose their tails.

• have similar features as fish.

• have more characteristics in common with each other than with retiles and birds

What are some common similarities that all embryos share? select ALL that apply

• Have eye spots that develop into eyes

• all develop into mammals

• similar shape

• Have tails at some point in development

The diagram illustrates an embryonic stage of two organisms.

Which of the following can be determined by observing the embryos shown in the diagram

• the organisms belong to the same genus

• the organisms share a common ancestor

• the organisms are originally from the same geographical area

• the organisms will grow as anamatically similar adults

In fish, Pharyngeal arches develop into____

• tails

• gill structures

• fins

• eyes