Decreases... barely any energy is transferred to the next level and most of it is lost through heat
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.
Ground my dude! wanna know how I know! I checked the other answers on the other one :)
Changes in the gene pool are closely related to genetic mutations, which are a major part of evolution.
