Correct Answer is A. They were able to increase their productivity due to the popularity of tractors.
Enzymes are large molecules that speed up the chemical reactions inside cells. Each type of enzyme does on specific job. Enzymes are a type of protein, and like all proteins<span>, they are made from long chains of different </span>amino acids<span>.</span>
Answer:
The coughing reflex kicks in, only if the epiglottis reflex fails to. If the coughing reflex fails then the Heimlich maneuver may be needed.
