Answers PBCSD_Grade_Forgiveness_2001310_Earth Space Science_S2_2019Unit Test

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A scientist discovers a new organism that is related to clownfish. What can the scientist discover by using molecular clocks?

the date that the organism first appeared in the fossil record

the age of the organism

the amount of time that the two species have been evolving apart

the number of years that fish have existed

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Which structures are similar in function, but do not indicate that the organisms are related?

analogous structures

homologous structures

vestigial structures

transitional structures

A scientist makes the argument that she has found DNA evidence that shows that evolution does not exist. What would her evidence have to show for her to be correct?

Strong genetic similarities in closely related organisms and weak genetic similarities in distantly related organisms.

Weak genetic similarities in closely related organisms and strong genetic similarities in distantly related organisms.

Strong physical similarities among closely related organisms and also among distantly related organisms.

Weak physical similarities among closely related organisms and also among distantly related organisms.

Which characteristic is shared by intrusions and faults?

All are cracks.

All are igneous rocks.

All cause gaps in the geologic record.

All are younger than surrounding rocks.

Which phrase describes organisms that formed index fossils?

are extinct

had soft parts

were generally large

lived in a narrow geographic area

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