All but which of the following statements are true about biogeochemical cycles?

It is D

Explanation:

all the others are false

a.

Biogeochemical cycles are cycles involving only nonliving components.

b.

The rock cycle is a biogeochemical cycle.

c.

Biogeochemical cycles are not an important part of the Earth system.

d.

Carbon, nitrogen, and oxygen cycles are biogeochemical cycles.

answer: national resource conservation services

national resource conservation services is the us. based approach that provides technical and financial assistance for natural resource management. nrcs society in conservation of resources by involving in activities like farmland protection, flood prevention, watershed protection, urban conservation, conserves economic and environmental conditions. it conducts soil surveys and implements the policy of natural resources management on the society.

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;