Which characteristic should a good scientific question have?

it should lead to a hypothesis that is not testable.
it should have a very broad focus with many variables.
it should repeat a question that the researcher has answered before.
it should be based on observations instead of just imagination.

The right option is; It should be based on observations instead of just imagination

Asking a scientific question is the first part of the scientific method. A good scientific question should be based on observations of a matter of interest and not just imagination, and it should have some actual answers. Also, a good scientific question should be testable through an experiment and should lead to a hypothesis that is confirmable.

identify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.identify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.v