Answer:
A bacteriophage attaches itself to a susceptible bacterium and infects the host cell. Following infection, the bacteriophage hijacks the bacterium's cellular machinery to prevent it from producing bacterial components and instead forces the cell to produce viral components.
An electric clothes dryer that draws 20 amps of current from a 240-volt wall outlet will use 4800 watts of power.
The equation is P(W) = I(A) × V<span>(V)</span>
<span>P(W)= amp x voltage</span>
<span>20 amps x 240 volts = 4800 watts.</span>
Answer:
Jonas Salk was awarded the Nobel Prize for discovering a way to vaccinate against polio in the United States in the 1950's. This allowed millions of school-age children to avoid crippling disease, and to swim during summer again, as polio was often spread in public swimming areas before.
The statement that best describes how the polio vaccine works is:
It triggers the immune system to produce antobodies to fight the disease-causing agent.
Explanation:
There are two main reasons for this answer. The first one is that every vaccine is aimed to introduce a controlled amount of antigenes to be accepted by the organism. These antigens are made after some studies were conducted in a lab and were obtained from substances that the human body can accept to train the immune system to develop an effective defense for the virus or bacteria on the matter. In our case, the polio vaccine works the same way and allowed to save many lives.
*The rate at which radioactive decay occurs.
*How much radioactive decay has occurred.
Humans have approximately 24,000 genes, but fruit flies are not far behind, with approximately 14,000 genes.
