how is photo-oxidation harmful to plants - biology - photosynthesis in higher plants 
how is photo-oxidation harmful to plants?
due to o2 there occurs destruction
or oxidation of photosynthetic pigments and intermediate, this
process is photo oxidation as it destructs pigments it is surely
harmful to plants
yes, the plants have chloroplasts and they have chromoplasts. 

chromoplasts contain pigments, just like chloroplasts, but the pigments are not photosynthetic. their abundant pigments overwhelm the light reflected from the chloroplasts making the leaf another color. chromoplasts are what color flowers, fruit and other plant parts. the function of chromoplasts pigments can be as a signal or protective.

chromoplast content in leaves varies naturally in plants. plants with more chromoplasts can survive regions of marginal nutrient resources because they are better protected from both oxidative and uv stress. the green leaved sugar maple is more sensitive to nutrient stresses associated with low ph soils than the red maple acer rubrum. acidic soils are less fertile. an increase in chromoplast content can mediate the negative effects of nutrient imbalances on maples by relieving uv & oxidative stress. red maples can out compete other maples for nutrient poor acidic soils by having more chromoplasts. 
http://www.ingentaconnect.com/content/bsc/pce/2005/00000028/00000007/art00005 
http://www.rsc.org/delivery/\_articlelinking/displayhtmlarticleforfree.cfm?journalcode=pp&year=2005&manuscriptid=b417802e&iss=4

chromoplasts content in flowers signals to pollinators while in fruit it signals to seed dispersers when the plant is ready for them. chromoplasts are not different organelles they are chloroplasts that continued to mature with regulation to produce more carotenoids or anthocyanins than chlorophylls. high industry areas could have issues with higher pollution problems with the air and water. high electrical plants might also cause emf problems for those that are sensitive to high electrical wave forms. there would also be more traffic in these areas and therefore, more potential for increased problems with pollution. see more... be very careful. hydrogen peroxide can damage you ears and cause serious trouble. see more... (a) the candidate was studying the effect/importance of sunlight on the rate of photosynthesis.explanation: the candidate had covered one part of the leaf to study the rate of photosynthesis in the absence of sunlight. the candidate would compare it with the rate of photosynthesis on the uncovered parts of the leaf and thus, determine the role of sunlight during photosynthesis.(b) yes, the uncovered portion of the leaf of the potted plant is used as the control here.explanation: the control is used to compare the results which will be obtained after the experiment with the covered portion of the leaf to obtain conclusions.(c) plant was kept in the dark before the experiment, to remove the starch present in the leaf, to the storage organs.explanation: destarching is done by placing the plant for 24-48 hours in darkness before starting the experiment. this is done to make sure that all starch has been formed under experimental conditions only.(d) 1) first, the candidate would have dipped the prepared leaf in boiling water to kill the leaf cells.2) then he would have boiled the leaf in methylated spirit to remove the chlorophyll.3) the leaf would have then been placed in hot water to soften it.4) he would have placed it in a dish and poured iodine solution. the presence of starch is confirmed in regions that turn bluish-black in colour.the uncovered portion of the leaf would have turned bluish black and the cover region would have turned brown in colour.explanation: the uncovered portion of the leaf would have turned bluish black as starch would have formed in those regions. sunlight activates the chlorophyll, which in turn catalyzes the photosynthesis reaction. in the covered portion, on which sunlight could not have penetrated, the region turns brown due to the absence of chlorophyll. this implies that photosynthesis would not have taken place on the covered portion of the leaf. A food with higher specific heat most likely causes burns. Photography is the process of making pictures (graph) using light (photo)...  
Light takes the most important role on produce nice pictures  
  
There`re no fixed rules about photography, it`s an art so nobody have rights to say that the photo is good or bad...  
  
During rainy day, you should prepare camera`s water-proof jacket or an umbrella to protect it against water. Some expensive cameras have been equipped with water-proof material. chloroplast is a powerhouse for the synthesis of carbohydrates in plants. it is broadly divided into three parts (fig 3) namely:a) membrane: chloroplast is double walled organelle viz. it contains inner and outer membrane.b) stroma corresponds to the cytoplasm of chloroplast. it also serves as site for dark reaction of photosynthesis to take place.c) thylakoids/ granum: thylakoids contains chlorophyll that absorbs light. stacks of thylakoids are known as granum.fig 3 shows different parts of chloroplast the primary difference between c4 and cam plants transfer the co2 molecules to lessen photorespiration while cam plants choose when to extract co2 from the environment. the c4 plants avoid moving the co2 molecules into the bundles where co2 hydroponics is a type of horticulture and a subset of hydroculture which involves growing plants (usually crops) without soil, by using mineral nutrient solutions in an aqueous solvent. terrestrial plants may grow with their roots exposed to the nutritious liquid, or, in addition, the roots may be physically supported by an inert medium such as perlite, gravel, or other substrates. there are 3 types of hybridisation for carbon in organic compounds, sp, sp2 and sp3 depending on the number of sigma and pi bonds between the carbon atoms. more the ‘s’ character more is the electronegativity of the carbon as ‘s’ orbitals are closer to the nucleus, hence electrons held more closely.