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Evolutionary History 1.5 (2/17) Exit Ticket

Last updated almost 3 years ago

2 questions

1

Question 1

1.

The diagram above shows the major components of a human heart and a turtle heart. What conclusion can be made based on the fact that humans and turtles both have similar structures in the heart?

Turtles and humans are different species, so they must not have a common ancestor species. They inherited these structures from different species.

1

Question 2

2.

What conclusion can scientists make about gorillas and chimpanzees when we see that their hands have the same number of fingers made out of the same bones?
CFS:
student describes the relationship between anatomical similarities and differences in animal species
student describes the chronological difference between animal species with a common ancestor based on body structures

The turtle and human share the same ancestor population that had a heart with these four parts. They inherited these structures from the ancestor population.

All species have their own specific hearts, so it is a coincidence that the turtle and human each happen to have a heart with the same four parts.

It is impossible to say. Organisms having similar hearts is not enough information to suggest common ancestry.