Answer: true : A pure substance is something that occurs in nature. An element is made up of one type of atom only and cannot be split further. A compound has the combined properties of the elements from which it is made. Atoms show the macro properties of an element.
Explanation:
It is true .
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What does the diagram represent
Answer:
I wanna say C but im not sure.
Explanation:
NEED HELP WITH HOMEWORK!!!
The mutation that causes sickle cell is:
1. deletion
2. Addition
3. substitution
4.Unpoint