Answer:
As lineages invade different niches and become isolated from one another, they split, regenerating some of the diversity that was wiped out by the mass extinction. The upshot of all these processes is that mass extinctions tend to be followed by periods of rapid diversification and adaptive radiation
The correct answer should be something like: "Gene therapy involves the use of bacteria or viruses to deliver new or modified genes to cells". That is what can be concluded based on the paragraph you provided.
Skeletal muscles are CELLS formed by skeletal muscle tissue, and the tissue is made up of skeletal muscle ORGANS. Hope that helps :)
Where are the bloodstain patterns?