Answer:
A principle of law stating that within a sequence of undisturbed sedimentary rocks, that the oldest layers are on the bottom and the youngest are on the top. rock layers have a unique set of fossil animal and plant remains which can be used to determine the relative ages of rock layers.
Explanation:
The answer is A index fossils
Answer:
Phylum arthropoda includes animal which lack tissues. Arthropoda is termed as a proposed grouping of arthropods.
Answer:
what element is all life based on
Explanation:
the element is element carbon
