Alzheimer's disease is most closely linked to the deterioration of neurons that produce: a) acetylcholine.
b) endorphins.
c) epinephrine.
d) dopamine.

In some plants, pointed leaves (p) are dominant over rounded leaves (p). a plant with a genotype of pp

When coal has reached it hardest, darkest form, it is called select one: 0 a. sub-bituminous b. lignite c. bituminous d. antrhacite next page

African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.