Common Ancestry

Labelling

Which organism do you think is a human?

Drag labels to their correct position on the image

6

3

8

4

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7

2

1

Multiple Choice

How does studying embryonic development provide evidence for evolution?

• A common ancestor provided the timing for development that all species share.

• Similar development provides evidence for species to develop from different ancestors at the same time.

• Embryonic development provides evidence that species share many common ancestors.

Multiple Choice

Which statement about vestigial structures is true?

• Smaller today than in prehistoric times

• Now perform two functions instead of one

• Body parts that support evidence for a different ancestor

Multiple Choice

Which is an example of a vestigial structure?

• Bat wing

• Thyroid hormone gland

• Whale pelvic bone

• Insect and bird wings

Multiple Choice

Which did a common ancestor provide?

• Similar timing and stages of development

• Similar mutations at the same time

• Body parts that are no longer useable

Multiple Choice

The ostrich is a large, flightless bird. Its wings, therefore represent evidence for...

• Embryonic development

• Homologous structures

• Analogous structures

• Vestigial structures

​1/10 CA: Structures WS
or (B) CA: Structures WS
VESTIGIAL




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1/6 HW Quizlet Evolution #1
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Multiple Choice

Embryos look the most similar across different species during the early stages of developement.

• True
• False

Multiple Choice

• Homologous
• Vestigial
• Analogous

Multiple Choice

If species A and B have very similar genes and proteins, what is probably TRUE?

• species A and B share a relatively recent common ancestor
• species A evolved independently of species B for a long period
• species A is younger than species B
• species A is older than species B

Multiple Choice

• Homologous
• Vestigial
• Analogous

Multiple Choice

Why is embryology evidence important?

• It shows that we are people.
• We can figure out why things evolved.
• So that we know how things evolved.
• It helps us understand that we are related to other creatures.

Multiple Choice

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.

Multiple Choice

An anatomical feature that no longer seams to have a purpose in the current form of an organism

• Homologous structure

• Analogous structure

• Vestigial structure

• None of the above

Multiple Choice

Embryos are used as evidence for_______.

• mutations
• artificial selection
• evolution/common ancestry
• embryos