Answer:
it would be C, D, E
A is a mixture
B is a mixture
C is a pure substance because Oxygen gas by the chemical symbol O2, is strictly pure
D is pure substance because Gold is one of the basic elements found naturally in nature, and as such, in its pure form
E is a pure substance because Both ice and liquid water are the same substance. H2O Though ice water is a mixture of both solid and liquid it is a pure substance, based on the molecular structure of its components .
F is a mixture
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I think the answer is d not quite sure tho
<h2>Answer:</h2>
Because same base pairs are arranged differently among organisms due to which there are so much variations in organisms.
<h3>Explanation:</h3>
- Variation in the organism is due to the genes.
- Every one have different DNA/genes which describes one's features.
- Genes are various arrangements of these four base pairs.
So same base pairs with different pattern arrangement causes variation among organism.
