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madisonraynor_ madisonraynor_
wrote...
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5 years ago
What portion of the digestive system will begin the process of chemical digestion of proteins?
 
  a. Large intestine
 b. Stomach
 c. Small intestine
 d. Rectum
 e. Mouth

Question 2

Explain how similarity in amino acid sequences among species indicates shared ancestry.
 
  What will be an ideal response?
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Replies
wrote...
5 years ago
Answer to q. 1

b

Answer to q. 2

Changes in amino acid sequence due to mutation, that dont disrupt the functioning of a protein
accumulate gradually over time. The further back in time that the ancestors of two species split from
one another, the greater the accumulation of these changes in their separate lineages. Species that share
a more common ancestor have more similar amino acid sequences because fewer changes have
occurred.
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