Answer:
Circle - Phosphate group
Rectangle - Nitrogen base
Middle - Pentose sugar
Explanation:
True, a lot of cultivated fields use fertilizers that can be harmful to fish
Answer:
c) matter in an ecosystem flows in one direction and is never reused.
Explanation:
A is true
sodium-potassium pump. n. The enzyme-based mechanism that maintains correct cellular concentrations of sodium and potassium ions by removing excess ions from inside a cell and replacing them with ions from outside the cell.