21 Which pair of substances is transported in the phloem? А
amino acids and protein
B
amino acids and sucrose
C
protein and starch
D
starch and sucrose

A. amino acids and protein

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.

the scientific method.