A distinctive neurotoxin known as BMAA is produced in these organisms and is thought to be responsible for a variant of amyotrophic lateral sclerosis that used to be highly prevalent among the Chamorro of Guam.
A distinctive neurotoxin known as BMAA is produced in these organisms and is thought to be responsible for a variant of amyotrophic lateral sclerosis that used to be highly prevalent among the Chamorro of Guam. Lawrence Johnson reclassified this phylum's families, which now include stangeriaceae and zamiaceae and some species have coralloid roots that contain symbiotic bacteria which help in nitrogen fixation. Thought to have evolved from the Medullosales due to their manoxylic wood and radiospermic seeds, they were ubiquitous from the late Permian through the Jurassic periods, but are now threatened due to their slow reproductive rate and habitat loss. For 10 points, identify this phylum whose plants bearing a single or cluster of large seedcones at the top of the center, that look like and are often confused with palms.
A distinctive neurotoxin known as BMAA is produced in these organisms and is thought to be responsible for a variant of amyotrophic lateral sclerosis that used to be highly prevalent among the Chamorro of Guam.
{Cycad}s [or {cycadophyta}; or {cycadophyte}s]