Answer:
premarket tobacco application (PMTA) is an application that must be reviewed and approved by the Food and Drug Administration before a new tobacco product can be legally marketed in the United States.
Explanation:
Answer: A
Explanation: The answer is A.
Answer:
The correct answer is - Increase in competition. destroy habitat, water and resources scarcity, and reduction in population.
Explanation:
Landslides are the movement of debris, rock, or land. It can be lethal and affects the ecosystem in various ways. The major effect on the ecosystem is destroying the resources and habitat of the organisms and even pollute water streams and water bodies with excess debris and sediment. It affects water quality and aquatic organism's habitat.
It destroys a large part of habitat such as forest, shelter and affects the life on the particular ecosystem. The reduction of the plants and vegetation leads to a reduction in food which increases the competition.
Answer:
It plays an important part in the development of embryos, and it is important for the growth and development of our bodies as well. Mitosis produces new cells, and replaces cells that are old, lost or damaged. In mitosis a cell divides to form two identical daughter cells.
Explanation:
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.
