An eating disorder research website or a Mental health research website such as National Institute Of Mental Health. It can help you keep up to date because websites are most times updated with new information and easy to access now a days.
Its the Chromosomes, if your talking about the human cells.
Answer:
Slow-twitch muscles are able to use oxygen more efficiently than fast-twitch muscles.
Explanation:
Hope it helps! :P
You may not be flexible and hurt your key badly and can lead to a lot of pain