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Lananicole98 Lananicole98
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6 years ago
The proportion of fast and slow-twitch fibers found in an individual's quadriceps muscle is primarily determined by the
 
  a. individual's diet.
 b. number of hours the individual spends each week engaged in anaerobic activity, like weightlifting.
 c. the number of ACTN3 genes that person has
 d. number of hours the individual spends each week engaged in aerobic activity, like running or cycling.
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summer123summer123
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6 years ago
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Lananicole98 Author
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6 years ago
Thank you, thank you, thank you!
joyceess
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Yesterday
I appreciate what you did here, answered it right Smiling Face with Open Mouth
Tabitha.davis
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2 hours ago
Thanks for your help!!
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