Sonar testing has caused whales to die in mass amounts.
4 because the distance is 40 and it hit the ground in 5 seconds
Answer:
Gap junctions within the intercalated disks
Explanation: Gap junctions within the intercalated disks allow impulses to be propagated from one cardiac muscle cell to another. It allows sodium, potassium, and calcium ions to flow between adjacent cells, propagating the action potential, and ensuring coordinated contractions.
Answer:
absorption of oxygen
Explanation:
the others would not make sense so i think this is the answer
