Tiktaalik

Select ALL the evidence that supports the idea that four-legged animals came from fish.

• All are vertebrates

• The embryos and DNA are similar

• The fossil record shows relatedness

• They have all the same bones

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-3

Why did scientists lead by Shubin decide to search in the Canadian Arctic for transition fossils? Select all that apply.

• Age of the rocks

• Kind of the rock there

• Other parts of the world had been explored already

• The climate/weather was the best there

If scientists knew the relative age of the fossil they were looking for, should they search for it in rocks that are...

• Younger than the fossil?

• Same age as the fossil?

• Older than the fossil?

Tags

NGSS.MS-ESS1-4

What characteristics of Tiktaalik are fish-like? Select all that apply.

• Fins

• Gills

• Scales

• Swim bladder to float

Tags

NGSS.MS-LS4-2

What characteristics of Tiktaalik make it a tetrapod? Select all that apply.

• Eyes on the top of head

• Flat head

• Hip bones

• A neck

• Tetrapod-like ribs

Tags

NGSS.MS-LS4-2

How long did it take for vertebrates to transition from water to land?

• Thousands of years

• Hundreds of thousands of years

• Millions of years

• A billion years

Why is the one bone/two bone/many bones/digits limb pattern important for origin of the tetrapods?

• It completes the fossil record.

• It shows how fish developed legs once on land to become tetrapods.

• It can show how all tetrapods still have basic fin bones.

• It can show a pattern of relatedness over time.

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

When do scientists believe Tikaalik lived?

• 4.6 BYA

• 375 MYA

• 100 Years Ago

• 265 MYA

• 100 MYA

Tags

NGSS.MS-ESS1-4

NGSS.MS-LS4-1

Where would Tikaalik be positioned on our timelines? Between which two other organisms?

• Between the Lungfish and Eusthenopteron

• Between Eusthenopteron and Acanthostega

• Between Acanthostega and Pederpes

• Between Pederpes and modern day humans

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

When Darwin wrote On the Origin of Species, no transitional fossils had been discovered, but Darwin predicted that some would be found. On which of the following concepts was Darwin basing his bold prediction? (Select all that apply)

• Individual organisms can change from one form to another, therefore transitional forms must exist in the fossil record

• All major groups of organisms living today descended from preexisiting groups. There must therefore be fossils with features that link different major groups, both living and extinct, to one another.

• Darwin reasoned that eventually the fossils of all organisms that ever existed would be discovered and that there would have to be some transitional forms among them.

• Major transitions in the history of life occur over long periods of time and in small steps rather than major leaps, with groups of animals evolving traits that did not exist in the ancestral groups.

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2