The mechanism for evolution is natural selection
<span>jeremy's SUBSTANCIA NIGRA is producing less DOPAMINE than what it needs to.
Substancia nigra is a "black substance" located in the midbrain. When there is the death of dopaminergic neurons in the substantia nigra, the quantity of dopamine decreases, causing Parkinson symptoms. With time passing, the fewer neurons Jeramy will have and those symptoms will become more severe, that is the reason why is smoking more. The nicotine from cigarettes help modulate dopamine transmission and so, to reduce some symptoms.</span>
<span>The axon carries information from the cell body out to the terminal buttons. An Axon, commonly referred to as a nerve fiber, is a long and slender in shape, it is the projection of a nerve cell that generally is responsible for conducting electrical impulses, referred to as action potentials, away from the body of the nerve cell.</span>
<span>The correct answer is option D.An ecosystem consists of a population of organisms and its physical environment, and a population is made up of many different communities of organisms. An ecosystem is a bilogical system of populations and environment. And a population consists many communities and finally the communities are nade up of organisms.</span>
Money for Marsupials. The reason for this is because the marsupials population is endangered, like koalas
