Cell structure over time is known as a free radical
Answer: true
explanation: i got it right
Answer: 
- Lead, cobalt, arsenic and selenium appear to pass the placental barrier by a diffusion mechanism. It was also found that the mercury levels in cord blood were almost double those of the mother, suggesting that the foetus may act as a filter for the maternal mercury levels during pregnancy.
Explanation:
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i believe its c cause i got that one right
<span>You react differently under the influence of alcohol and you do things that you would not normally do.</span>