Answer:
<em>The correct option is C) happened by chance</em>
Explanation:
Mutations can be described as any changes which occur in the DNA of an organism. Mutations can be natural or induced through methods like the use of chemicals.
Mutations occur randomly and happen by chance. Hence, option C is correct.
Other options like option A are false because mutation is the sudden change in the genome of an organism. Hence, mutations will not cause the teeth to grow longer until they reach an optimal length.
It’s important because at this stage, teens are going through a more intense period of growth and learning. Teens must learn to mange their emotions/ feelings and think about how they feel and not acting out in a way that may hurt another person. If one is feeling angry, they must learn to not let that feeling control their behaviour such as hitting, screaming etc. And instead by talking it out with an adult, going for a walk to let out steam, listening to music etc.
Answer: All are correct except smoking.
Explanation: Cigarettes contain carcinogens which can greatly INCREASE the risk of heart disease, heart attack, and stroke.
However, a healthy diet and regularly exercising will reduce the risk.
A. HIV is a sexually transmitted diseases and its called Human immune virus.
Chemotherapy is the use of various toxic chemicals to kill off rapidly multiplying cells.
