Taxonomy; Plant And Animal Structure Db

Plant and Animal StructureDuckweeds belong to a family of hydrophytic (aquatic ) poses called duckweed family and atomic number 18 con placered the smallishest flowering im installs . These plants lack the recognizable stems and leaves and they be kinda characterized by several small flatcartened be adrift complex body brush offcels , which be believed to be limited leaves , often called as thalloids , with elementary or no radicals . Duckweed roots do non disclose secondary rebelth , branching presence of root hairs and be not even responsible for the absorption of take in involve for survival . Instead , these roots serve as anchors of the plant in to keep the orientation of the duckweed right side up besides urine turbulence . Roots of the duckweed argon besides very sticky which in aid in its spreading whenever mobile organisms 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 , wax on the thalloids and keep to it until maturity and then separate as a sassy organism from the plant . The simplicity of the structure enables the duckweeds to be clear(p) enough to be buoyant above water . merely , duckweeds still give way a specialized structure called aerenchyma , which arrest air pockets , resembling hulls of ships The preference of natural selection and growth having water as their habitat , shying away from soil , decreases opposition for nutrients from the hide and especially sunshine against larger terrestrial plants Since duckweeds grow well in water with high nitrogen and inorganic phosphate levels they fire be used to facilitate bioremediation of eutrophic waters and unlike al ga , they are readily edible with respect to! phytophilous 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 part of the United States and by dint ofout Mexico .

splenic pear cacti have flat , rounded and fleshy special stems called platyclades The cacti platyclades primarily function as storage of water captive by cacti , photosynthesis and provide for the macrocosm 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 l arge , 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 can 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 native plant parts , unique to each of their species , have enabled them to suffer in these unfavorable circumstances . Even though in soaking or in scorched conditions , Mother spirit does unceasingly find a way to nurture and ferment lifeReferencesAudesirk , T (2008 . Biology : Life on Earth with...If you involve to position a full essay, order it on our website: Orde rCustomPaper.com

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