Answer:
The four levels of protein structure are distinguished from one another by the degree of complexity in the polypeptide chain. A single protein molecule may contain one or more of the protein structure types: primary, secondary, tertiary, and quaternary structure.
Explanation:
The answer has to be B. Distribution of ocean food chain
One is optamistic feedback and another is pesimistic.
Answer:
the answer might be A as eco means environment
Answer:
. The cell membrane is a lipid bilayer that prevents that passage of water and ions. This allows cells to maintain a higher concentration of sodium ions out the outside of the cell.
Explanation:
Mark as brainliest please!