Taxonomy; Plant And Animal Structure Db

Plant and Animal StructureDuckweeds belong to a family of hydrophytic (aquatic ) poses called duckweed family and nuclear number 18 con expressionred the smallishest flowering im installs . These plants lack the recognizable stems and leaves and they be kinda characterized by several small like a shottened drift organises , which argon believed to be limited leaves , often called as thalloids , with wide-eyed or no base of operationss . Duckweed roots do non disclose secondary bristleth , branching presence of root hairs and argon not even responsible for the absorption of piss involve for survival . Instead , these roots serve as anchors of the plant in to keep the orientation of the duckweed right side up besides water turbulence . Roots of the duckweed be besides very sticky which in aid in its spreading when ever mobile beings come in contact with it . The stomata on the undersurface of the thalloids account for the needed water by the organism . Although these plants make up seeds fruits and flowers , they primarily reproduce asexually . Buds , called fronds , vex on the thalloids and keep to it until maturity and then separate as a sassy organism from the plant . The simplicity of the social system enables the duckweeds to be clear(p) enough to be buoyant above water . merely , duckweeds still discombobulate a specialized structure called aerenchyma , which arrest air pockets , resembling hulls of ships The preference of natural selection and organic evolution having water as their habitat , shying away from soil , decreases tilt for nutrients from the hide and especially sunshine against larger terrestrial plants Since duckweeds grow well in water with high nitrogen and orthophosphate levels they fire be used to facilitate bioremediation of eutrophic waters and cont radictory alga , they are readily edible wit! h respect to saprophytic fishes ill-natured pear tree cacti belong to the genus Optunia of the family Cactaceae the family of cactuses . These cacti are found in teemingness in the Western reference of the United States and by means ofout Mexico .

mordacious pear cacti have flat , rounded and fleshy modified stems called platyclades The cacti platyclades primarily function as storage of water captive by cacti , photosynthesis and provide for the excogitation of flowers . Just as other(a) cacti , prickly pears have spines . However , these species of cacti have two kinds of spines , which are modified leaves , one type of which are large , sedate and fixed , and the other type , termed as glochids , are small , hairlike and unfastens easily from the plant . These modified leaves not solitary(prenominal) reduce the amount of water lost through plant transpiration , but also provides protection from potential predators Prickly pear cactuses characteristically have thigmotactic anthers , the pollen producing part of the plant which croup respond to a touch stimulusBoth of these plants have evolved to live on foreign regions , almost inhabitable to most organisms . Their adaptations and modification of necessity plant parts , unique to each of their species , have enabled them to brave out in these unfavorable circumstances . Even though in soaking or in scorched conditions , Mother character does unceasingly find a way to nurture and trim lifeReferencesAudesirk , T (2008 . Biology : Life on Earth with...If you essential to position a full essay, order it on our website: OrderCustomPaper.com

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