Light needs matter or material to carry light true or false

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.

b is the correct answer

i don't understand

explanation:

i don't understand your question

answer; heredity;