Embryological Evidence of Evolution

_____________ is the study of embryos. It can be used to see how embryo similarities and differences indicate an evolutionary relationship.

• Paleontology

• Common ancestry

• Homologous structure

• Embryology

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

• a common ancestor.
• an embryonic stage.
• development.
• evolution.

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-3

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.

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-3

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.

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-3

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.

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-3

The more similar the stages of embryonic development, the more likely that organisms share ____________

• a common ancestor.
• embryos.
• eggs.
• embryology.

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-3

True or False: embryos of species only look similar if their adult forms look similar

• True

• False