Select the neurological problems that primarily affect people who are fifty years or older.
Alzheimer's disease
Parkinson's disease
epilepsy
stroke
multiple sclerosis

Scientists discovered fossils in several layers of the earth you see here. they found fossils of algae, snails, and clams in layer d. given that information, where do you think they found fossil evidence of simple land plants and amphibians? a. a b. e c. f d. g