Iogeochemical cycles a. are not essential for life b. move through abiotic and biotic regions c. are the result of natural disasters d. provide the greatest amount of energy for the earth

Answer is b. move through biotic and and abiotic regions.

Biogeochemical cycles involves continuous movement of chemical elements from biotic (living) to abiotic (non-living), from soil to plants and atmosphere to land or water bodies. Examples of biogeochemical cycles are carbon cycle, nitrogen cycle, oxygen cycle, water cycle. These are called cycles because matter is conserved and moves from abiotic to biotic in a cyclic manner.  

Correct option: B (move through abiotic and biotic regions).

Biogeochemical cycles:

hormones in blood stream

image: dtc.ucsf.edu

endocrine glands secrete hormones into the blood stream near them; the hormones then travel in our bloodstream until it reaches its destination, called a target cell, in distance parts of the body. in the target tissue, hormones lock onto the target’s plasma membrane, called the receptor site.

the sphincter muscles at the end of the digestive tract is the anus.