WHY does SUCCESSION OCCUR?

Why does ecological succession occur? Every species has a set of environmental conditions under which it will grow and reproduce most optimally. Ecological succession may also occur when the conditions of an environment suddenly and drastically change.

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.