Nicotine, once in the brain, will work specifically on nicotinic receptors in the brain. However, there is a common "addiction" pathway in the brain that pretty much all addictive substances go through.
Answer:
As the body tries to fight the infection, the immune system causes inflammation to make it hard for the virus to copy itself. The process of fighting the infection causes most of the symptoms people have. As the virus makes its way down to the lungs it can cause the lungs to become inflamed. This can lead to pneumonia.
Explanation:
I am thinking C. Good luck
New, more adaptable species flourish, replacing the extinct species.
The selection pressures before the extinction tend to favor a certain type of organism and the sudden shift in conditions help others move up the food chain.
The mode of evolution that is represented by this example is
called coevolution. Coevolution is the process in which two independent species
influence the evolution of each other. This process involves natural selection.
There is nothing working as a forcing agent. Since this orchid named bumblebee
orchid is totally dependent on a single species named bumblebee for its
pollination and this evolution process, so this process is called coevolution. Various
other organisms also follow this method of pollination to continue their cycle
of evolution.
