<h2>Tropomyosin</h2>
Explanation:
This protein is most likely: Tropomyosin.
Sacromere is the structural unit of myofibrils i.e. the fibres of the muscles.
Tropomyosin is the muscle protein that function in contraction of muscle filaments.They are arranged laterally along the myofilament. When the researcher is observing the sacromere, she is observing the muscle fibre. So, the protein that lines the periphery along the thin filament is more likely to be tropomysin.
Answer:
The lack of access to clean drinking water poses a serious health risk around the world, and funds must be raised to help achieve universal access.
I have already answered you. It's B
About 2.5 % I think maybe if your talking about fresh water
