Answer:
you are using your shoulder muscle. The reason you are using this muscle is when you put your arm strait up there is no reason to use a bicep or tricep muscle.
Explanation:
The mass extinctions that occurred 250 million years ago and 65 million years ago may have been due to gradual process or Catastrophic events.
Uranium is not a renewable resource.
Hope this Helps!!!
Answer:
Mutations can be caused by radiation
if my answer helps you than mark me as brainliest.
