An error in transcription/translation affects only one cell.
An error in DNA replication would affect many generations of cells.
1. Scientists may want to get a better understanding of the natural world.
2. They want to gather more data, info, etc about a certain topic.
3. They may want to make predictions and give explanations about a topic.

<em><u>One of the best ways to determine if a tree or any plant is dead is the tree scratch test. Just beneath the dry, outer layer of bark in a tree's trunk lies the cambium layer of bark. In a living tree, this is green; in a dead tree, it is brown and dry</u></em>
<em><u>Follow</u></em><em><u> </u></em><em><u>me</u></em><em><u>!</u></em><em><u>!</u></em>