A dog breeder breeds a german shepherd dog with a poodle to create a dog that has traits of both varieties of dogs. This is an example of...

artificial selection
natural selection
mode of inheritance
sexual reproduction

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.

cell division is not regulated in tumor cells.