Answer:
they have different witnesses
Explanation:
The sources of evidence have the different witnesses attached to them. The primary source of evidence is to prove a case in the court of law. In other words, the source of the evidence is to make sure that there is sufficient information to build a case. Thus, the evidence can come in many forms - the physical, the document, the demonstrative, and the testimony. However, the physical evidence is the most reliable form. In an unchanged state, the physical evidence, like DNA is very reliable.
The opportunistic has a longer lifespan than the equilibrium populations
Cells contain a nucleus that holds instructions for the cell
