The measurement of species numbers is called what?

How does buring fossil fuels impact does carbon cycle? what large impact does this have on the envirnment?

Hedgerows have created a new ecosystem within britain’s a. farms b. cities c. forests d. industrial areas

The nervous system interacts with the endocrine system by a. using hormones as connections b. sending nerve impulses directly to glands c. using neuroendocrine cells as connections d. sending neurotransmitters directly to neurons