<span>The correct option is A. Endomembrane system is a series of units that work together to label, package, and transport proteins and molecules. Endomembrane system are found in the endoplasmic reticulum and golgi apparatus. The major components of the endomembrane system are golgi apparatus, endoplasmic reticulum, vessicles, cell membrane and the nuclear membrane. </span>
Answer:
<em>In biochemistry and pharmacology, receptors are chemical structures, composed of protein, that receive and transduce signals that may be integrated into biological systems</em>
Answer:
C. Metalloid
Explanation:
<h3>I believe that's the answer, correct me if I'm wrong. </h3>
B.
Viruses are classified as biological agents instead of a living things, $& they are only made of genetic material.