Flu vaccines need to be revised and changed every year because the flu virus constantly mutates. Flu viruses can change in two ways: drift or shift. Antigenic drift occurs when genes of the virus slowly change during replication until the immune system no longer recognizes it. On the other hand, antigenic shift occurs when a major change in the virus happens. This usually leads to a totally different kind of virus. This is what happened during the H1N1 scare in 2009.
DNA viruses like mumps are less prone to mutation due to the presence of DNA polymerase. RNA viruses are more prone to mutation because they undergo reverse transcription to simulate the role of DNA.
Answer:
The waiting room became the conditioned stimulus.
Explanation:
Conditioned stimulus is the reflexive behaviors or the learned behavior.
This stimulus may be defined as a neutral stimulus that with some time and some training will evoke a response by continuously being associated with any other natural occurring stimulus.
Answer:
DNA's information can expressed through flow of information from DNA to RNA to protein provides the cell with a potential control point for self-regulating its functions
Answer:
A. It contributes to global warming
Explanation:
- Solar power is the power of the future and is an essential nonrenewable source of energy for man. Solar power is driven by the incoming solar energy in the form of solar rays.
- Solar power is eco-friendly and doe not cause any harm can be sued in the summer season and has ample scope for greenhouse gases.
- As per the statement, the solar power should be used as the main energy source in U.S can be contradicted by saying it contributes to global warming.
Answer:
Pedagogy, andragogy, and gerogogy are three different ori- entations to learning in childhood, young and middle adulthood, and older adulthood, respec- tively.
Explanation:
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