The Newest Clam Shell Is Built

question 27

Multiple Choice

The newest clam shell is built

• A) on the outside so the periostracum is the newest material.
• B) on the inside so the inside nacreous layer is the newest.
• C) both directions outward from the central prismatic layer.
• D) all at once; all layers of shell are the same age.
• E) None of the choices are correct

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Family Income

The combined total earnings of all members of a family, contributing to the household's economic standing.