Answer:
The executive branch carries out and enforces laws. It includes the President, Vice President, the Cabinet, executive departments, independent agencies, boards, commissions, and committees.
The answer to the question is B
The palaeozoic started in a period in which invertebrates started proliferating rapidly and in large amounts, which was considered a historical event and the end of that gigantic era.
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Answer:
The correct answer is: none of these mineral groups contain silicon.
Explanation:
The only minerals that contain silicon are the Silicates, for example, SiO2 (silica).
Halides are minerals that consist of a combination of elements from the seventh group that can form salts (like fluorine or chlorine), with other elements such as calcium and sodium. For example: NaCl (sodium chloride).
Carbonates are compounds that contain carbon and oxygen, for example, CaMg(CO3)2 (dolomite).
Sulfides consist of sulfur with another element. For example: ZnS (zinc sulfide).
