Answer:
1. A pure substance has a definite constant composition.
2. A compound is composed of two or more types of matter that can be present in varying amounts.
3. A solution is a homogeneous mixture.
4. A mixture that is not uniform throughout is a Heterogeneous mixture
5. A pure substance that cannot be broken down chemically is a element.
6. A characteristic of matter that’s not associated with a change in its chemical composition is known as a physical property.
7. Wax melting is an example of a physical change in the state of matter.
8. A banana peel turning brown is an example of a chemical change in the state of matter.
Answer:
I dislike biology since I suck at it
Explanation:
Answer:
Pyrimidine
Explanation:
This is because pyrimidine are one of the two types of heterocyclic nitrogenous bases of RNA and DNA. They include uracil, cytosine and thymine in RNA. They have single structure and have nitrogen at position 1 and ring at 3. Pyrimidine are present in Vitamins such as ribloflavin, folic acid and thiamine. Pyrimidine derivatives have characteristics that are antiviral, antibacterial, antifungal, sedative e.t.c.
This is sooooo hard but I’ll try
