Answer: isotopes is the answer to this question
C. both biotic and abiotic factors in earth most ecosystems have both abiotic and biotic systems. They actually need both in order to survive.
Each parent gives half of their genetic material to the offspring, which results in an unique combination of both parents, so they appear similar to the parents, sometimes looking similar to a generation before the parents.
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.
