Mutualism is relationship that is beneficial to both organisms involved. The relationship between a plant and a bacterium called a mutualism because both of them help each other. Bacteria are involved in increasing the fertility of the soil by fixing atmospheric nitrogen and thus provide plant with nitrogen. In return, the bacteria make their homes in what usually become nitrogen "nodules" along plant roots. The plant gets food, the bacteria gets shelter, everybody wins.
No. The natural selection is when the best suit fits survive. Therefore is not the idea that as an environment changes.
Facilitated diffusion occurs with the help of a transport protein, such as electrons passing through ATP synthase in the electron transport chain.
Muscle spasms<span>Hypocalcemia can cause
emotional disturbances
depression of the nervous system
muscle weakness
sluggish reflexes
muscle spasms</span>
It means that his autonomic(sympathetic) nervous system is activated.
