11 questions
Check each word that makes the following statement true:
The fossil record documents the ____ of life-forms throughout the history of life on Earth.
change
diversity
entire number
extinction
environment
Which of the following best describes what we mean when we talk about the fossil record?
leaf imprints found in hardened mud
the history of fossils in the last 400,000 years
a fossil in rock
all the fossils that have been discovered
Select each statement that explains why the fossil record is considered incomplete.
Not all organisms become fossils
some organisms have not been extinct long enough
there were times when fossils didn't form
there are still fossils that haven't been found
some organisms are too small to make fossils
Which organisms are older, according to the fossil record?
fish with fins
tetrapods with limbs
an aquatic animal with gills and limbs
Why do we find more fossils of organisms such as snails and vertebrates than organisms such as jellyfish?
Jellyfish do not have bones
jellyfish are not extinct
jellyfish do not die
Fossils found in the top layer of soil are most likely _____ then fossils found in a deeper layer.
older
younger
The age of a fossil is the same age as the rock it is found in.
true
false
Organisms with shells appeared before tetrapods.
true
false
The lowest layer of rock would contain the _______ fossils.
oldest
youngest
Fish and organisms with shells lived at the same time.
true
false
How do fossils of limb structures provide evidence that ancient and modern tetrapods are related?
they have the same pattern of one bone, two bones, many digits.
they are exactly the same
They are not related