Rough ER is dotted with ribosomes which give it a "rough" appearance. Smooth ER doesn't contain ribosomes. :) Hope this helps!
dont copy me
C. mRNA (the m stands for messenger)
Arrow a should point to muscle tissue, arrow B should point to an organ, arrow c should point to organ system.
Answer:
Divergent boundaries
Explanation:
Infact, a supercontinent did exist, called Pangea. We know this because each continent fits together like a puzzle piece. The same life forms most likely split off into different families or groups, and over the course of millions of years, the continents split, leaving different groups separated.
