Which of the following is an essential characteristic of an index fossil?
A) The organism lived in a very specific environment or two, such as tropical volcanic islands.
B) The organism lived for a very limited period of geologic time.
C) The fossils of the organism are exceptionally well preserved.
D) The organism lived on the land, not in the ocean.
Question 2
Using the known rates of radioactive decay to date the crystallization of certain minerals is known as ________ dating.
A) conventional
B) radiometric
C) relative
D) fossil assemblage
Fossil of Proganochelys quenstedti
Hartmann's mountain zebra resting, showing its characteristic essentially unbarred belly
Emphysema. (a) Illustration comparing normal lungs and emphysemic lungs. The inserts illustrate how
The fossil record of chimpanzees is sparse. The femur from Kikongo, Uganda (c) may represent a late
Fossil pollen
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