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.
-look at the obvious
-analyze the artwork
-decide on an interpretation
-make a judgement call
Answer:
The car locomotes
The cars engine makes noises when ignited
The fumes produced by the car when it moves.
Explanation
Stomata open in the daytime, when there is an abundance of heat energy from the sun that causes evaporation of water, causing the guard cells to become flaccid, allowing the stomata to open.
Answer:
The statement is true.
Explanation:
During the first half of the 20th century, racism was extreme and constant in many countries. This racist thinking forced African American people to eat, drink, study and do everything in different places. Also, the only work they could do was housekeeping or physical work like construction.
