Answer:
the tooth brush was invented in the 15th century
The major parts of the digestive system:<span>Salivary glands.
Pharynx.
Esophagus.
Stomach.
Small Intestine.
Large Intestine.
<span>Rectum.</span></span>
Animal testing is necessary to advance scientific knowledge.
Explanation:
Animal testing has been practiced for a long time, and it has been proven to advance scientific knowledge. The statement "Animal testing is necessary to advance scientific knowledge" is an example of a claim of fact.
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