Answer:
Harmful mutations may cause genetic disorders or cancer. A genetic disorder is a disease caused by a mutation in one or a few genes. A human example is cystic fibrosis. A mutation in a single gene causes the body to produce thick, sticky mucus that clogs the lungs and blocks ducts in digestive organs.
Mutations arise spontaneously at low frequency owing to the chemical instability of purine and pyrimidine bases and to errors during DNA replication. Natural exposure of an organism to certain environmental factors, such as ultraviolet light and chemical carcinogens (e.g., aflatoxin B1), also can cause mutations.
only a small percentage of mutations cause genetic disorders—most have no impact on health or development. For example, some mutations alter a gene's DNA sequence but do not change the function of the protein made by the gene.
Answer and Explanation:
Risky behavior defines that behavior which is riskier to the life of people
As if you want to choose a career in a Nurse or a Doctor you want to judge the risk.
As a doctor, if the doctor gives the high dosage to the patient to recover from illness but even less dosage also works still the doctor gives which affect the kidney, liver of the patient, etc
Well, it is a great career as a doctor you can help many poor people by giving them free medical treatment in return you get the blessings which surely worked.
But there are many hospitals who are taking extraordinary charges even they do transplants, surgeries where there is no need just to earn the money but this is not acceptable and in one day everyone knows about it what they are doing
Therefore do not play with the life of the people as it is precious for them.
Answer: D
Explanation: because it is
When stimulated, the brain stem's sneeze center orders muscle contractions from esophagus to sphincter. That includes the muscles controlling the eyelids. Some sneezers even shed a few tears. Perhaps people close their eyes while sneezing to prevent the expelled particles from entering their eyes,
