Cladograms Lesson

According to this phylogenetic tree, which creature is the least related out of all pictured?

• Fish

• Frog

• Salamander

• Human

Tags

Phylogenetic tree

What trait separates sharks from ray-finned fish?

• Vertebrae

• Bony skeleton

• Four limbs

• None

Tags

NGSS.MS-LS4-2

A clade contains

• all the organisms with similar appearances

• organisms living within the same ecosystem

• an ancestral species and all the organisms that came before it

• an ancestral species and all its descendants

Tags

NGSS.MS-LS4-3

What is the common ancestor of Letters C and E?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-LS4-2

Who do you think F is more related to?

• A

• E

Where would you put the new species "H"?

• line off of line "G"

• line off of line "A"

• make a whole new line between "A" and "F"

• line off of line "D"

Tags

NGSS.MS-LS4-2

Are cladograms a hypothesis or a fact?

• Absolute fact

• Hypothesis (a guess)

Tags

NGSS.HS-LS4-1

NGSS.HS-LS4-2

Of "A", "F", and "E", which is the oldest?

• A

• F

• E

Tags

NGSS.MS-LS4-1

A “family tree” made by scientists to show relationships of ancestry and similar traits between organisms.

• Cladogram

• Scientific Family Tree

• Pedigree

• DNA Test

Tags

NGSS.MS-LS4-2

NGSS.MS-LS4-3

How can a cladogram be used to show how closely related two organisms are?

• The further apart two organisms are on a cladogram the more they have in common.

• If two organisms are next to each other on a cladogram then they must be the same species.

• All organisms share a common ancestor.

• You can use a cladogram to see how many traits two organisms have in common. The more in common, the more closely related they are.

Tags

NGSS.MS-LS4-2