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At a fundamental level, water provides electrons to replace those removed from chlorophyll in photosystem II. Also, water produces oxygen as well as reduces NADP to NADPH (required in the Calvin cycle) by liberating H+ ions
During the process of photosynthesis, six molecules of carbon dioxide and six molecules of water react in the presence of sunlight to form one glucose molecule and six molecules of oxygen. The role of water is to release oxygen (O) from the water molecule into the atmosphere in the form of oxygen gas (O2).
Water also has another important role of being an electron feeder. In the process of photosynthesis, water provides the electron that binds the hydrogen atom (of a water molecule) to the carbon (of carbon dioxide) to give sugar (glucose).
Water acts as a reducing agent by providing H+ ions that convert NADP to NADPH. Since NADPH is an important reducing agent present in chloroplasts, its production results in a deficit of electrons, resulting from oxidation of chlorophyll. This loss of electron must be fulfilled by electrons from some other reducing agent. Photosystem II involves the first few steps of the Z-scheme (the diagram of the electron transport chain in photosynthesis) and therefore a reducing agent that can donate electrons is required to oxidize chlorophyll, which is provided by water (acting as a source of electrons in green plants and cynobacteria). Hydrogen ions thus released create a chemical potential (chemiosmotic) across the membrane that finally results in synthesis of ATP. Photosystem II is the primary known enzyme that acts as catalyst in this oxidation of water.
Answer:
Nang papalabas ang matanda, dumating sa isang karwahe si Crisostomo Ibarra, kasama ng isang matandang katulong. Tumungo sila sa sementeryo, kung saan hahanapin ni Crisostomo ang libingan ng kanyang ama, si Don Rafael. Mayroong itinirik na krus at mga bulaklak ang katulong sa libingan ni Don Rafael, at tinanong nila ang sepulturero kung saan ito. Sinabi ng sepulturero na sinunog niya ang krus sa libingan ayon sa utos ng isang kura, subalit hiniling siyang sabihin kung saan ang libingan. Ang sagot ng sepulturero ay wala na ang patay sa libingan; mga ilang buwan sa nakaraan, hinukay niya ang bangkay ni Don Rafael. Dapat ililipat ito sa libingan ng mga Tsino, ngunit dahil malayo ito, at umuulan din noong araw na iyon, inihagis ng sepulturero ang bangkay sa ilog.
Sobrang nagalit si Crisostomo sa mga nalaman niya. Tinawag niyang kulang-palad na alipin ang sepulturero, at umalis ng sementeryo. Lumakad siya papunta sa isang lumang bahay, ang dating bahay niya, habang sumusunod lamang ang katulong. Natagpuan ni Crisostomo ang kura ng San Diego, si Padre Salvi. Sinunggaban ang kura ng binata, na sa magalit na tono ay nagtanong kung ano ang ginawa ng kura sa ama. Nanginginig at natatakot, sinabi ni Padre Salvi na wala siyang ginawa sa ama ni Ibarra, at agad-agad niyang tinuro si Padre Damaso bilang ang taong may kasalanan. Binitawan ang Pransiskano ni Crisostomo, na tumuloy sa loob ng kanyang bahay. Samantala, tinulong si Padre Salvi sa pagtayo ng katulong na kasama ni Crisostomo.
– Anong nalaman at ikinilos ni Crisostomo ang maituturing na masamang pangitain?
Nalaman ni Crisostomo na sinunog ng sepulturero ang krus na itinirik ng katulong ni Kapitan Tiago sa libingan ni Don Rafael Ibarra, at hinukay ang bangkay niya at inihagis ito sa ilog. Sa galit niya, muntik nang baliin ni Crisostomo ang braso ng sepulturero. Ang mas malala pa ay nalaman ni Crisostomo na ang nag-utos sa sepulturero na hukayin ang bangkay ay isang kura: si Padre Damaso.
Mga Palagay:
Ang masasabi ko lang sa kabanatang ito ay dito magiging mas malubha ang tunggalian sa pagitan nina Crisostomo Ibarra at Padre Damaso. Ito lang talaga ang palagay ko sa Kabanata 13.
Explanation:
buod mo nalang bb
Probably a billion pieces to be honest
East African countries are very close to the equator, but do not have a tropical forest climate due to the fact that there has been significant deforestation in the region, due to population growth, logging and agriculture.
<h3 /><h3>What is the importance of environmental preservation?</h3>
Sustainability allows for the conscious use of scarce natural resources, increasing the quality of life for current and future generations, in addition to protecting rivers, forests and seas. Environmental degradation generates irreversible problems that impact the lives and health of individuals as a whole.
Therefore, it is essential that sustainability is promoted in society, through organizational practices of CSR, public policies and public awareness of the need to protect environmental resources.
Find out more about sustainability here:
brainly.com/question/4677073
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