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Evidence for Evolution Answers

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Which statements describe homologous structures? Select three options.An example of a homologous structure is the wing of a bird and an insect.An example of a homologous structure is the forelimb of a whale, a human, and a dog.Homologous structures have the same function but a different structure.Homologous structures have the same structure, but may have a different function.Homologous structures indicate a common ancestor.Homologous structures do not indicate a common ancestor.

A
An example of a homologous structure is the wing of a bird and an insect.
B
An example of a homologous structure is the forelimb of a whale, a human, and a dog.
C
Homologous structures have the same function but a different structure.
D
Homologous structures have the same structure, but may have a different function.
E
Homologous structures indicate a common ancestor.
F
Homologous structures do not indicate a common ancestor.
2
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Which statements describe analogous structures? Select three options.Analogous structures indicate a common ancestor.Analogous structures do not indicate a common ancestor.Analogous structures have the same structure, but may have a different function.Analogous structures have the same function but a different structure.An example of an analogous structure is the wing of a bat and a butterfly.An example of an analogous structure is the forelimb of a human, a dog, and a whale.

A
Analogous structures indicate a common ancestor.
B
Analogous structures do not indicate a common ancestor.
C
Analogous structures have the same structure, but may have a different function.
D
Analogous structures have the same function but a different structure.
E
An example of an analogous structure is the wing of a bat and a butterfly.
F
An example of an analogous structure is the forelimb of a human, a dog, and a whale.
3

Use the drop-down menus to complete the sentences.

Answers:
Tetra fish that live in caves are blind and have small eyes that do not work. This is an example of a .:vestigial structure
A harbour seal’s flipper and a human hand have a very similar structure, but function differently. This is an example of a .:homologous structure
4

Use the drop-down menus to complete the sentences.

Answers:
Tetra fish that live in caves are blind and have small eyes that do not work. This is an example of a .:vestigial structure
A harbour seal’s flipper and a human hand have a very similar structure, but function differently. This is an example of a .:homologous structure
5

✔ homologous structureanalogous structurevestigial structure

A
✔ homologous structure
B
analogous structure
C
vestigial structure
6

Explain why these two plants look so similar if their common ancestor was very distant.

Answer:

The two species independently evolved similar features because they face the same desert conditions, such as limited water and intense heat. This is convergent evolution.

7

Humans and dogs evolved from a common ancestor. Which pieces of evidence would support this? Select two options.Both of their adult forms look very similar.They both had a tail as an embryo.Their arm and leg structure is similar, but may have a different function.There are fossils of an organism that is half man, half dog in the fossil record.Both had gill slits when they were born.

A
Both of their adult forms look very similar.
B
They both had a tail as an embryo.
C
Their arm and leg structure is similar, but may have a different function.
D
There are fossils of an organism that is half man, half dog in the fossil record.
E
Both had gill slits when they were born.
8

Scientists were studying three different embryos to determine their relationship to humans. The notes about each embryo are shown in the chart. Based on the information, what can you determine?

A
Species A and B are related to humans.
B
Species A and C are related to humans.
C
Species B and C are not related to humans.
D
Species A and C are not related to humans.

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