Saturday, January 18, 2014

what is the modified part of rhizopora, maize, watermelon, opuntia & nepenthes? and Neoregelia cruenta

what is the modified part of rhizopora, maize, watermelon, opuntia & nepenthes?



also plz give the technical term


inflorescence best answer:

Answer by Marilyn
Rhizophora is a genus of tropical mangrove trees, sometimes collectively called true mangroves. The most notable species is the Red Mangrove (Rhizophora mangle) but some other species and a few natural hybrids are known. Rhizophora species generally live in inter-tidal areas which are indundated daily by the ocean. They exhibit a number of adaptations to this environment, including stilt-roots that elevate the plants above the water and allow them to respire oxygen even while their lower roots are submerged, and a cytological molecular "pump" mechanism that allows them to remove excess salts from their cells. [answer: the ROOT is modified]

In maize the INFLORESCENCE architecture has been modified. In seedless watermelons the CHROMOSOME NUMBER has been modified. They are triploid plants. Pollination triggers fruit development but the ovules abort without producing mature seeds. in opuntia the LEAF has been modified. In Nepenthes (tropical pitcher plants) the LEAF has been modified.

These changes are modifications of the basic parts of a plant. For example the primary functions of a root are normally to anchor the plant to the substrate and absorb water with it's dissolved mineral nutrients. The mangrove root is modified to absorb air. The primary functions of a leaf are gas exchange, transpiration and photosynthesis. In opuntia the leaf is modified to become a storage organ. In Nepenthes it's modified to capture and digest nitrogen rich prey.


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Neoregelia cruenta
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Inflorescence of Neoregelia cruenta

Foto tirada no Parque Nacional da Restinga de Jurubatiba, RJ.



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