why do high and low temperatures have an efffect on photosynthesis and respiration?
969379
Both speed up at high temperatures and slow down at low temperatures. Photosynthesis does have a maximum cutoff temperature (usually 30 C in temperate plants and I think 40 C in tropical C4 plants).
786686
Oxygen? Nothing really. But a high concentration of oxygen would mean a low concentration of carbon dioxide, meaning the oxygen would be blocking the stomata, allowing less CO2 to get in. Meaning in high O2 environmant, C4 plants would hve advantage in that they can still compete for CO2.
1126251
Okay, for plants to gain energy they break down sunlight through their cells in the way that is called photosynthesis. However, to do this, cells must keep their leaves open and faced towards the sunlight. Transpiration is like us sweating: we loose water in the process to cool down. The heat, air pressure, and solar radiation contribute to this. Because plants need energy, they have to open up and allow transpiration to happen. While they loose water, they gain energy. They just soak up more water from the ground. That is another reason why, if it is in a drought, that plants wither and die. They not only don't have enough water to keep themselves "fed" but the air is soaking up water when they gain energy.
477562
The cold temperature didn't allow the plant to perform its basic bodily functions.
579767
ok i have 2 possible answers. one is evaporation (the part of the water cycle in which water is put back in the sky and turns into clouds. that is my #1 answer but it could be possible that it is photosythesis because of what the plants do during that process but if u still have trouble go to where i go. www.google.com
562846
if a plant is in a windy area, evaporation happens faster. Or in not too bright of sun, photosynthesis happens faster.  Also, if it's well watered, the roots suck more in and push it through the plant.  \n\nThis probably won't help at all, since I have no idea of what you're really talking about, but someone once told me that they liked nothing more than attempted BS.
283286
"How plants are affected by temperature\nCardinal Temperatures - The temperature (T) below or above which a biological process does not occur. Physiological temperature range varies with the organism; extremes for most plants is between 0 and about 50 oC; each plant species would have a range more or less peculiar to it; plants are bred or selected for adaptation to temperature. \noptimum - T at which plant functions best \nminimum - T below which plant will not grow \nmaximum - T above which the plant cannot grow \nTemperature and plant growth - Illustrated by Q10 \nQ10 indicates how temperature will affect the rate of a process.  The higher the Q10 of a process, the more it is affected by temperature.  A 10oC increase in temperature can double the growth rate (a biological process) resulting in a Q10 of 2.  A shoot might grow 10 cm per day at the optimum temperature of 30oC but only 5 cm at 20oC giving a Q10 of 2.0 (Q10 = Rate at T + 10 oC/Rate at T).  The Q10 only has meaning within the narrow temperature range where a biological process increases with increasing temperature. \nPhotosynthesis (P) & Respiration (R) - PNet = Pgross - R; Keeping Pgross constant and varying R alters rate of growth and dry matter accumulation; unadapted plants accumulate dry matter more slowly than do those well adapted to their environment. \nCrop Development - correlation with temperature \nGrowing-degree day (GDD, heat unit, thermal time) - used to predict biological events. Accumulated GDD is related to time required to reach some phenological (development) stage of a crop. Corn, soybeans and many other crops are bred for adaptation to fairly specific environments; some are bred to require a specific number of  GDDs to reach maturity. \nCalculation \ncalculate mean daily temperature \nsubtract basal temperature (temperature below which growth does not occur) \nTmean = 23 oC; BT = 10 oC; 23 - 10 = 13 GDD \napproximately 3000 GDD required for pineapple fruit development. That equals 180 days during summer at Wahiawa but 220 days in winter and 250 days during winter at 2600 feet (796 m). Sweet corn maturity predicted using GDD on mainland."
41036
Bacteria have very short life cycles so adapt very quickly and many species do live in the artic. Like any process in coll temperatures the activity is decreases due to a decrease in kinetic energy, so activity is low.
527665
Are you are asking,"What is photosynthesis and oxygen exchange?"\nPhotosynthesis is when the plant uses sunlight as energy to live and grow.The plant takes the sunlight energy to produce and move nutrients taken from the ground.\nOxygen exchange is when a plant takes in carbon dioxide and releases oxygen back into the atmosphere.That replenishes the air.
941373
Within limits,as temperature increases,so does the amount of O2 released from the hemoglobin.Heat is a byproduct of the metabolic reations of all cells and the heat released by contracting muscle fibers tends to raise body temperature.Metabolically active cells require more O2 and liberate more acids and heat.The acids and heat, in turn, promote release of O2 from oxyhemoglobin(oxy binded with hemoglobin in blood).\n\nSo, increased in temperature caused the rate of respiration to increase too.Because O2 tends to be released from the hemoglobin compared to when the weather is cold.This explain why during fever,a person will breath faster than normal person.\nIn contrast,during hypothermia(lowered body temperature) cellular metabolism slows and the need for O2 is reduced,and more O2 remains bound to hemoglobin.\n\nPlease check my grammar too.Im sux with my grammar coz English is my 3rd language.So, please check it.Hope this helps ya!
661985
Few complex life forms we know of can survive exposure temperatures that low for more than a moment. However, if pockets of milder temperatures could be found (thermal vents, well isulated hybernation dens, etc) some life would likely adapt. Life forms that could mature and reproduce in one warm season (such as a plant that produces spores capable of surviving such a harsh winter) would have a great advantage. Plants such as trees woudn't stand a chance, as is true of many things humans and other complex life depend on for food and shelter. \n\nAnother consideration would be the erosion due to lack of any plants capable of maintaining a root system to stablize soil. Between the turbidity from erosion and likelyhood that all rivers would freeze solid through most of the winter, most life in rivers and lakes would become extinct. Since the upper temperature is not much if any higher than what we have now, the average temperatue is much lower. This would concentrate vast amounts of water in the icecaps, possibly enough to greatly increase the salinity of the oceans, which would also see a major drop in temperature. Most marine life is more sensitive to temperatue changes than terrestrial or freshwater life, so a great number of extinctions there also.\n\nSo no, life would not survive other than perhaps a few simple life forms. Even a drop of a dozen degrees in average temperature would be devastating in the long run for life as we know it.
593456
It's high in latitude where plant & vegitation growth are very limited due to cold climate\n\nhttp://en.wikipedia.org/wiki/Tundra
168741
B.\n\nOcean temperatures do not change very rapidly, and most organisms don't require large temperature changes.
758329
the equations of cellular respiration and photosynthesis are related because they are the converses of each other. cellular respiration is oxygen and glucose equaling carbon dioxide, water and energy. photosynthesis is when energy, water, and carbon dioxide equal oxygen and glucose. photosynthesis needs cellular respiration and cellular respiration needs photosynthesis.
218041
It is quite true that soil temperatures where the living parts of the plants are during winter are not as cold as the surface temperature. That is the first fact. The second thing that comes into play is that plants produce chemicals that depress the freezing point of water and prevent ice crystals from forming and rupturing cell walls. The next factor is that many plants forms seeds or spores that are biologically inactive when conditions are not suitable for growth. This is sort of a suspended animation. It is also important to recall that plants even as large as trees have only a very small proportion of actual "living material." In a tree in winter, the cambium and rootas are "alive" The cambium goes inactive and reactivates when spring comes and the roots remain fairly dormant through winter until warming weather stimulates the cambium back to life and the roots then beginning sending sap up the tree. The question is complex as plants vary from one celled organisms to trees.
94116
1. respiration is for animals, and phtosynthesis is for vegetals, bacteria and algae.\n\n2. We (animals) use respiration because our cells need a process called gas exchange ( we take Oxygen from the air and exchange it in our cells for carbon dioxide)\n\n3. This is possible for us because our cells have organs called mitocondria, while vegetal cells have chloroplasts.\n\n4.Photosynthesis is an important biochemical process in which plants, algae, and some bacteria harness the energy of sunlight to produce food. Ultimately, nearly all living things depend on energy produced from photosynthesis for their nourishment, making it vital to life on Earth. It is also responsible for producing the oxygen that makes up a large portion of the Earth's atmosphere. Organisms that produce energy through photosynthesis are called photoautotrophs. Half of all photosynthesis comes not from plants, but from bacteria and algae.\n\nResìration involves the use of developed organs such as lungs.\n\n5. Photosynthesis produces energy from sun light, while\nrespiration produces energy from the Oxygen present in pur atmospheric air.
905156
Advantage and disadvantage:\n\nPlants with high photosynthesis rates grows faster but has a shorter term of life.