Answer: <em> It cant change</em>
Explanation:
A theory does not change into a scientific law with the accumulation of new or better evidence
Phylum. The classification system goes: Kingdom, Phylum, Class, Order, Family, Genus, Species. Anything that shares a class also share anything above it.
Answer:
Test a known bloodstain as a positive control and a blank (filter paper) as a negative control (see interpretation of results to determine a positive and negative result).
Answer:
Copper and Iron
Explanation:
Phosphorus and Carbon are main group elements.
