Answer:
did you delete it or no? because that might've happened
Explanation:
it happened to me once
Answer:
Osteoblasts
Explanation:
Cells that secrete protein fibres in bones are called osteoblasts.
I hope this helps.
Answer:
I'm going to say nuclear power plants.
Explanation:
I heard that this generates electricity. I hope this helps! Keep learning! :)
Answer:
When resources are limited
Explanation:
