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★ Digestive System Quiz
A disease in which stomach acid goes up into the esophagus causing burning pain and sometimes ulcers.
A. celiac disease
B. GERD (acid reflux)
C. appendicitus
D. diarhea
Select your answer:
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Properties of Hair and Scalp › ViewThe hair shaft is located _______
A. Above the skin surface
B. Below the cortex
C. In the hair root
D. Under the skin
DNA & Types of Reproduction › View
The four differing nucleotide parts, called bases, are made of a few:
A. sugars
B. phosphates
C. nitrogenous bases
D. all of the above