Organelles exist within cells, which exist within tissues. Communities exist within ecosystems, which exist in the biosphere.
Answer: If enough evidence accumulates to support a hypothesis, it moves to the next step — known as a theory — in the scientific method and becomes accepted as a valid explanation of a phenomenon.
Only once because the DNA replication initiation is tightly linked to cell cycle progression,ensuring that replication occur only once per cycle
Answer:
Neutrons are sub-atomic particles located in the nucleus of an atom. They have an atomic mass of one unit and have no charge.
Explanation:
