The bones in the forelimbs of humans, dogs, cats, whales, and bats each include the humerus, radius, ulna, carpals, etc. The SIMILAR structure suggest these organisms share a common ancestor.

Many fossils of the same animals in the same location suggests

In layers of rock, the deeper you dig, the__.

The pelvis and tiny hind leg bones of modern-day whales are considered __ because they are no longer used by the animal.

In undisturbed rock,

The type of rock that is good at preserving fossils are:

The type of rock that does NOT preserve fossils are:

Scientists find the same fossils in layers of rock from two separate locations of rock layers. What could they infer about the age of the rock?

A fossil was found below rocks that were 520 millions of years old and above rocks that were 550 millions of years old. What can you conclude about its age?

The wings of an insect and the wings of a bat both enable flight but are structurally DIFFERENT!

Fossils can tell us:

A calcium regulating structure in all vertebrates that becomes glands or gills in the neck starts off as this structure:

The pharyngeal pouch in all vertebrates turns into either

We can look at living organisms and compare them with fossils to get an idea of how the prehistoric creatures lived and behaved.

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