A stream flows from a mountain peak into a lake. What is the base level of the stream? A. the level of the mountain peak
B. the total distance that the stream falls
C. the average gradient of the stream
D. the level of the lake

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.

[content deleted] - user123802726recklesschicken

the denominator has a very specific role.

hi~~

i would say that hybridization occurs frequently in nature, because there are many types of hybrids that have occurred naturally, such as the mule (male donkey + female horse)