Weathering is a destructive force because is moves and breaks up peices of rock and dirt.
An organized way to collect and record scientific observations is to write it down in a notebook or make a chart.
<span>they are both controlled by many </span>genes<span> or </span><span>alleles.
hope this helps :)</span>
Answer: Your answer should be:
<u>C.</u><u> muscle cells during vigorous exercise</u>
Explanation:
Lactic acid is produced in your muscles and builds up during intense exercise.