The answer is the first one The Earth rotates on its axis over 24hrs.
Answer:
Specific enzymes break down proteins into amino acids
To test if the chickens lacked thiamine the scientist could test the blood concentration of thiamine in the chickens on a future study, unless blood samples were taken during the original study.
In any future studies, the same experiment would need to be done but with this added measurement on both the control group and the test subjects.
Articulations.
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A cell spends 10-20% of its time in Mitosis.
If this is wrong...sorry :)