Not the right subject, but anyway,
233 W * 0.001 kW/W 10.8 hours a day * 365 days a year
= 233*0.001*10.8*365 kW-hours/year
= 918.5 kW-h/year
Biologists who work in the fields of genomics and molecular biology study DNA genome content and analyze genetics on a molecular level. They do it to map DNA and use it to prevent diseases or anything similar.
Most vaccines will cause your body to produce cells that in turn produce thier own antibodies in order to fight off future illnesses later on whereas antibiotics provide a quick dosage of antibodies with no prolonged immunity and in fact kill off alot of the good bacteria in your body
The answer is B) Genetic variation
Drugs and other chemicals are examples of how environmental factors affect gene expression. These drugs can either 'activate' or 'inhibit' the expression of genes that you have. For example, taking drugs while being pregnant affects the genetic makeup of the baby inside you.