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Aloe vera (/ ˈ æ l oʊ (i) v ɛr ə, v ɪər-/) is a succulent plant species of the genus Aloe. It is widely distributed, and is considered an invasive species in many world regions.. An evergreen perennial, it originates from the Arabian Peninsula, but also grows wild in tropical, semi-tropical, and arid climates around the world.
Botanists define vascular plants by three primary characteristics: Vascular plants have vascular tissues which distribute resources through the plant. Two kinds of vascular tissue occur in plants: xylem and phloem. Phloem and xylem are closely associated with one another and are typically located immediately adjacent to each other in the plant.
Indeed, the purpose of an encyclopedia is to collect knowledge disseminated around the globe; to set forth its general system to the men with whom we live, and transmit it to those who will come after us, so that the work of preceding centuries will not become useless to the centuries to come; and so that our offspring, becoming better instructed, will at the same time become more virtuous and ...
A more well-known xerophyte is the succulent plant Agave americana. It is cultivated as an ornamental plant popular across the globe. Agave nectar is garnered from the plant and is consumed as a substitute for sugar or honey. In Mexico, the plant's sap is usually fermented to produce an alcoholic beverage.
Plants are the primary producers in most terrestrial ecosystems and form the basis of the food web in those ecosystems. [82] Plants form about 80% of the world biomass at about 450 gigatonnes (4.4 × 10 11 long tons; 5.0 × 10 11 short tons) of carbon. [83]
Casparian strip. The Casparian strip is a band-like thickening in the center of the root endodermis (radial and tangential walls of endodermal cells) of vascular plants ( Pteridophytes [1] and Spermatophytes ). The composition of the region is mainly suberin, lignin and some structural proteins, which are capable of reducing the diffusive ...
Xanthophyll. The characteristic color of egg yolk results from the presence of a xanthophyll pigment typical in color of lutein or zeaxanthin of the xanthophylls, a division of the carotenoids group. Xanthophylls (originally phylloxanthins) are yellow pigments that occur widely in nature and form one of two major divisions of the carotenoid ...
Dipterocarpaceae is a family of 16 genera and about 695 known species [3] of mainly lowland tropical forest trees. Their distribution is pantropical, from northern South America to Africa, the Seychelles, India, Indochina, Indonesia, Malaysia and Philippines. [4] [5] The greatest diversity of Dipterocarpaceae occurs in Borneo.