Answer:
1. Sympathetic input increases ventricular contractility, thereby increasing stroke volume.
2. Sympathetic input decreases conduction time within the heart, decreasing the delay between atrial and ventricular contractions.
3. Sympathetic input increases the speed of ventricular contraction.
I think that the answer is Clams, fish and trees Thanks for posting your questions on brainly
I would assume it is neutral stimulus but I may be wrong
Answer:mutation
Explanation:
As it reproduces it can mutate and cause a new virus