<h2>Answer:</h2>
To differentiate between the structural properties of the chemical molecules.
<h3>Explanation:</h3>
Isomers of a chemical compound are two chemical compounds having the same chemical formula but different structure in three dimension.
Many physical and chemical properties are dependent on the structure of the chemical molecules.
These structural differences leads to many different bonding abilities to other molecules and leads to different properties like melting and boiling points.
Answer: B. by toxic chemicals (in smoke) or radiation that can damage the DNA in cells.
Explanation:
The carcinogens presents in cigerates covalently bind to DNA and form DNA adducts which results into miscoding (e.g., insertion of the wrong base) during replication of DNA and this genetic mutation causes uncontrolled cellular growth which causes cancer.
Ionising radiation including X-rays, radioactive particles, and gamma rays,can cause cancer by damaging DNA. high-energy radiation damages DNA and cause genetic mutation same as cigerates and causes cancer.
Both toxic chemicals (in smoke) or radiation damages DNA inthe cells which leads to cancer.
Hence, the correct option is B.
The best and most correct answer among the choices provided by your question is the third choice.
Atrophy occurs when a muscle becomes weaker and smaller from not being used
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The answer is D. Headwaters
