Matches in DBpedia 2016-04 for { <http://wikidata.dbpedia.org/resource/Q1089795> ?p ?o }
- Q1089795 subject Q21517874.
- Q1089795 subject Q7032525.
- Q1089795 subject Q7356140.
- Q1089795 subject Q8376866.
- Q1089795 abstract "Cycads /ˈsaɪkædz/ are seed plants with a long fossil history that were formerly more abundant and more diverse than they are today. They typically have a stout and woody (ligneous) trunk with a crown of large, hard and stiff, evergreen leaves. They usually have pinnate leaves. The individual plants are either all male or all female (dioecious). Cycads vary in size from having trunks only a few centimeters to several meters tall. They typically grow very slowly and live very long, with some specimens known to be as much as 1,000 years old. Because of their superficial resemblance, they are sometimes mistaken for palms or ferns, but are only distantly related to either.The living cycads are found across much of the subtropical and tropical parts of the world. The greatest diversity occurs in South and Central America. They are also found in Mexico, the Antilles, southeastern United States, Australia, Melanesia, Micronesia, Japan, China, Southeast Asia, India, Sri Lanka, Madagascar, and southern and tropical Africa, where at least 65 species occur. Some can survive in harsh desert or semi-desert climates (xerophytic), others in wet rain forest conditions, and some in both. Some can grow in sand or even on rock, some in oxygen-poor, swampy, bog-like soils rich in organic material. Some are able to grow in full sun, some in full shade, and some in both. Some are salt tolerant (halophytes).The three extant families of cycads are Cycadaceae, Stangeriaceae, and Zamiaceae. Cycads have changed little since the Jurassic, compared to some major evolutionary changes in other plant divisions.Cycads are gymnosperms (naked seeded), meaning their unfertilized seeds are open to the air to be directly fertilized by pollination, as contrasted with angiosperms, which have enclosed seeds with more complex fertilization arrangements. Cycads have very specialized pollinators, usually a specific species of beetle. They have been reported to fix nitrogen in association with a cyanobacterium living in the roots. These blue-green algae produce a neurotoxin called BMAA that is found in the seeds of cycads. This neurotoxin may enter a human food chain as the cycad seeds may be eaten directly as a source of flour by humans or by wild or feral animals such as bats, and humans may eat these animals. It is hypothesized that this is a source of some neurological diseases in humans.".
- Q1089795 kingdom Q756.
- Q1089795 thumbnail Cycas_circinalis.jpg?width=300.
- Q1089795 wikiPageExternalLink Nfix1.html.
- Q1089795 wikiPageExternalLink cycadsociety.org.
- Q1089795 wikiPageExternalLink palm-trees.org.
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