Comparative Anatomy Exit Ticket

A change in the inherited characteristics of an organism over time is ________

• evolution.
• development.
• growth.
• ancestry.

Another word for specific parts that form an organ, system, or living thing is __________.

• structure

• vertebrae

• function

• organism

_____________  is the study of embryos to see how their similarities and differences indicate an evolutionary relationship.

• Paleontology
• Common ancestry
• Homologous structure
• Embryology

The most recent ancestral species from which two different species evolved is known as ________________________.

• a common ancestor

• an embryonic stage

• development

• evolution

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

• look very similar.
• have very different features.
• show different stages of development.
• have only a tail if they are non-human.

In stage 2 (middle row) fish embryos _________

• are very different bird and mammal embryos.
• are still very similar to bird and mammal embryos.
• show arm and leg buds.
• are the only embryos with tails.

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

• have more characteristics in common with each other than with reptiles or birds.
• are still hard to tell from reptiles and birds.
• have the same features as fish, reptiles, and birds.
• do not have tails.

When vertebrates are in the early stages of development (an embryo) they all possess....

• gill slits and tails

• backbone and hands

• hands and feet

• tongue and mouth

The structures shown are_________

• homologous
• heterologous
• analogous
• vestigial

This embryonic line likely belongs to a...

• Dog

• Chameleon

• Tortoise

• Dinosaur

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