1 Red algae and green algae include unicellular species, colonial species, and multicellular species. 2  These protists have a special photosynthetic species that are the base of the food web in some habitats. Stramenopiles main characteristic is the flagellum that each protist has. 2  In most protists in this phylum, the hairy flagellum is paired with a short smooth flagellum. o Diatoms: Diatoms are unicellular and are producers of the food chain. 3  These organisms have a cell wall that is made of silica.
Parkinson's disease is a chronic, degenerative neurological disorder that affects one in 100 people over age 60. While the average age at onset is 60, some people are diagnosed at 40 or younger.
Dementia is relatively rare in people with onset of Parkinson's disease before age 50 years, even when the disease is of long duration. Dementia is more common in people with an older age (about 70 years) at onset of Parkinson's disease.