Iodine is necessary for _____. producing properly-formed collagen maintaining normal thyroid function transporting proteins in l
1 answer:
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Answer:
Explanation:
An element only has <u>one</u> type of atom and cannot be broken down by chemical means.
Let's analyze the answer choices.
1. This has two types of atoms, so it cannot be an element. It has more than one type of atom.
2. This has two types of atoms that are bonded together. It cannot be an element because there is more than one type of atom and the bonds can be broken.
3. This has one type of atoms, so it is an element.
Therefore the best answer choice is 3.
The cell that has the nucleus is eukaryotic and the cell that doesn't have a nucleus is eukaryotic
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