Answer:
Tropomysin, calcium
Explanation:
Tropomysin is a protein that prevents muscle contraction hence acts as a contraction inhibitor. It wraps around the actin blocking the binding sites for myosin on the actin.
Muscle will only contract when they get a rush of calcium ions.
The calcium ions binds to troponin, the troponin changes its shape. The change in shape will remove tropomyosin from the binding sites allowing myosin to bind on the actin leading to muscle contraction.
I think it's the first and second option but I could be wrong because I don't know much about deserts :)
One statement that could disprove this theory is the fact that, according to the cell theory, all cells come from pre-existing cells. This basically means that cells can't just appear from nowhere; they have to come from another cell. Based on what we know today from scientific research, is there another law or statement that you could come up with to help disprove the theory? Hope this helped! :)
Answer:
Point-source pollution is easy to identify. As the name suggests, it comes from a single place. Nonpoint-source pollution is harder to identify and harder to address. It is pollution that comes from many places, all at once.
