Over time, individuals with helpful variations will a)reproduce unfavorable traits
b)die off
c)survive and reproduce those helpful variations
d)become new species

Jesus is always the answer

answer; i believe the correct answer is ( proteins );

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.