c3 and c4 plants
C3 and C4 plants have two things in common, they both are found in hot and very dry areas and they both use photorespiration. However, the difference is the way they react toward water loss which will affect photosynthesis. If a C3 plant starts to transpire rapidly because it is photosynthesizing and the stomata are open, then it will close the stomata, ending photosynthesis. What the plant does next is undergo a counterproductive cycle called photorespiration. In the C3 plant photorespiration actually uses up 50% of the CO2 fixed by the Calvin cycle. What happens is the plant closes it’s stomata and as a result stops transpiration and photosynthesis. What happens is the O2 level rises and the CO2 drops. Then the plant must use O2 in place of CO2 to input into the Calvin cycle. A two carbon molecule comes out and is broken down by peroxisomes into CO2. This just uses up CO2 and doesn’t benefit the plant because no energy or food is made in this process. In a C4 plant it is different. When it needs to close it’s stoma to stop transpiration, it undergoes photorespiration as well, however, it’s photorespiration is productive. Preceding the Calv
Plants are closer to humans then you would think. Plants reproduce, have a life span, respond to their environment, and even communicate. Plants are able to do all these things because of evolution. Reproduction evolved from spores to uncovered seeds to fruit seeds and pollen and the use of stigmas and stamen. Evolution imbedded an internal clock into plants so they would know when to open and close there stomata and when to perform other functions like reproduction. Plants adapting and responding to there environment was all part of evolution to make the plants survive and change just like the desert, rainforest, and tundra plants. evolution was responsible for everything that the plant has. Evolution gave the plants hormones to perform duties and to help the plant to carry out its task of passing down it’s genes to the next generation and then mixing them up with other plants so the DNA wouldn’t be wiped out in a massive plague. Evolution was responsible for everything. in Cycle it incorporates CO2 into an organic compound first, or the CO2 into phosphoenolpyruvate to form oxaloacetate. PEP carboylase has a higher affinity for CO2 then rubis
Some topics in this essay:
C3 C4,
Calvin Cycle,
Eyed Susan’s,
CO2 CO2,
O2 CO2,
calvin cycle,
bundle sheath cells,
bundle sheath,
sheath cells,
seeds fruit seeds,
c3 c4 plants,
genetically engineered plants,
evolution plants,
c3 plant,
engineered plants,
c4 plant,
genetically engineered,
4 carbon,
close stomata,
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Approximate Word count = 779
Approximate Pages = 3 (250 words per page double spaced)
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