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Author Question: Which of the following is most often caused by Group A beta-hemolytic streptococcus? a. Otitis media ... (Read 59 times)

Yolanda

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on: Jun 25, 2018
Which of the following is most often caused by Group A beta-hemolytic streptococcus?
 a. Otitis media
  b. Tonsillitis
  c. Chickenpox
  d. Asthma
  e. Frequent colds

Question 2

The skin, nails, brain, lining of the oral cavity, and the enamel of the teeth are formed from which layer?
 a. Ectoderm
  b. Endoderm
  c. Mesoderm
  d. Both a and b


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Edwyer

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Reply #1 on: Jun 25, 2018
Answer to Question 1

b

Answer to Question 2

a
RATIONALE: The skin, nails, brain, lining of the oral cavity, and the enamel of the teeth are formed from the ectoderm layer in the embryo phase of development.


Yolanda

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Reply 2 on: Jun 25, 2018
Thanks for the timely response, appreciate it

xiazhe

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Reply 3 on: Yesterday
Excellent

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