The correct answer is an accumulation of microorganisms in deep marine environments.
Chalk rock refers to a pure form of limestone produced in tropical and warm seas about 100 million years ago in the Cretaceous period. The microscopic marine algae known as coccoliths thrived in the ancient seas. Their shells were comprised of calcite. With the death of the algae, their bodies sunk to the floor of the sea and sediment of chalk got deposited.
Over many years layers of chalk sediment got deposited and resulted in compaction of loose sediment into solid chalk rock.
Answer:
Both of these are correct
moves constantly between Earth's surface and the atmosphere
and it is matter that is essential for life
It is usually acetic acid that nature likes to make lipids out of.
Answer:
American politician Elbridge Gerry, Vice President of the United States at the time of his death, who was Governor of Massachusetts.
Explanation:
Dr. mengele invented the scientific method, which is controlling variables in experimentation to find evidence for theories.
