The two classes of flowering plants (angiosperms) are distinguished by their numbers of seed leaves: monocotyledons (monocots) have one blade-shaped cotyledon, whereas dicotyledons (dicots) possess two round cotyledons. Gymnosperms are more varied. For example, pine seedlings have up to eight cotyledons. typical young seedling consists of three main parts: the radicle (embryonic root), the hypocotyl (embryonic shoot), and the cotyledons (seed leaves).
The success of the first two Oasis-class ships led Royal Caribbean Cruises to order a third ship of the type in December 2012. Harmony of the Seas was floated out on 19 June 2015, began her first sea trials on 10 March 2016, and was delivered to Royal Caribbean on 12 May 2016. After a construction time of 32 months, the ship first set sail on 15 May 2016 from the STX France docks in Saint-Nazaire, viewed by some 70,000 people.
Royal Caribbean Internationalâs Harmony of the Seas, featuring WÃ¤rtsilÃ¤ engines, propulsion equipment, exhaust scrubber systems, WÃ¤rtsilÃ¤ NACOS Platinum navigation and dynamic positioning systems, as well as WÃ¤rtsilÃ¤ CCTV systems and various electrical & automation solutions, is now in commercial operation.