Positive feedback is a control system that sends a signal to ( increase) a response.
Answer:
A and D
Explanation:
Dolphins have a narrow, torpedo-shaped body to swim easily through water. Their strong, paddle-like flippers also aid in strong swimming.
However dolphins do not secrete gases or attach themselves to the bottom of the sea, so the answers are A and D.
Good luck ^^
Answer:
They are used to transport electron during metabolic reaction.
Make products more bio degradable
