Photosynthesis

Matthew Law
Mind Map by , created about 6 years ago

GCSE Biology (B4 - The Processes of Life) Mind Map on Photosynthesis, created by Matthew Law on 08/29/2013.

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Matthew Law
Created by Matthew Law about 6 years ago
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1 Photosynthesis is a series of chemical reactions that USES ENERGY from SUNLIGHT to PRODUCE FOOD
1.1 the food that's produced is GLUCOSE, a sugar with a multiplicity of uses...
1.1.1 RESPIRATION
1.1.1.1 plants use some of da glucose for respiration (NOT BREATHING!), which releases energy from the glucose
1.1.2 to make CHEMICALS to HELP THE PLANT GROW
1.1.2.1 glucose can be converted into cellulose for making cell walls, indeededly so in a rapidly growing plant
1.1.2.2 glucose can also be combined with nitrogen (from nitrates taken up from the soil by plant roots) to make amino acids, which are then made into proteins
1.1.2.3 glucose is also used to help make chlorophyll
1.1.3 STORED AS STARCH
1.1.3.1 glucose can be turned into starch and stored in roots, stems and leaves, being used at times when the rate of photosynthesis is slower, like in winter
1.2 photosynthesis happens in the cells in green parts of plants, eg. leaf cells and some microorganisms, eg. phytoplankton
1.2.1 organisms that photsynthesise are at the start of food chains, making the energy from the Sun available to other organisms by converting it into glucose and passing it down along the food chain when the organisms are eatened
1.2.1.1 it's a green substance, found in the chloroplasts in animal cells, which ABSORBS SUNLIGHT and allows the energy to be used to convert carbon dioxide and water into glucose
1.3 chlorophyll is needed for photosynthesis to happen
1.4 as evidenced in the exquisitely plagiarised diagram to the bottom of me (hehe! bottom!), oxygen is produced as a waste product of photosynthesis, which is actually rather helpful for polluting humans.
1.4.1
2 RATE OF PHOTOSYNTHESIS
2.1 the
2.2 is affected by three environmental factors...
2.3 AMOUNT OF CARBON DIOXIDE
2.3.1 carbon dioxide is one of the raw materials needed for photosynthesis and, as with light intensity, as the amount of carbon dioxide increases the rate of photosynthesis increases, up to a cretain point.
2.3.1.1 if it's warm and bright enough, the amount of carbon dioxide is usually the limiting factor for the rate of photosynthesis
2.4 TEMPERATURE
2.4.1 when the temperature is the limiting factor in the rate of photosynthesis it's usually because it's too low, eg. in winter.
2.4.1.1 this is because the enzymes needed for photosynthesis work mooorrreee sloooowwwlyyy at low temperatures
2.4.2 if the plant gets too hot, the enzymes it needs for photosynthesis and its other reactions will be denatured
2.4.2.1 this happens at about 45°C, which is pretty toasty outdoors but possible in a greenhouse
2.5 AMOUNT OF LIGHT
2.5.1 light provides the energy needed for photosynthesis, and so as it is raised, the rate of photosynthesis increases steadily up to a certain point
2.5.2 at night the amount of light is usually a limiting factor on the rate of photosynthesis
3 Investigating Photosynthesis
3.1 yay imaginary fieldwork!
3.2 TAKING A TRANSECT
3.2.1 transects are a way of investigating how something changes across an area
3.2.1.1 to set up a transect you run a tape measure between two set points - simples!
3.2.1.1.1 you then start at one end of the transect and collect the data that you want
3.2.1.1.1.1 and then move along the transect and collect the data again
3.2.1.1.1.1.1 and again
3.2.1.1.1.1.1.1 and again
3.2.1.1.1.1.1.1.1 and again
3.2.1.1.1.1.1.1.1.1 jusqu'à tu reach the end...voilà!
3.2.2 for example, if one was to investigate the effect of coolness on the distribution of coeliacs, one could take a transect across an area where the coolness level changes (eg. from Harston to Hauxton) and one could collect data on how the percentage of people with different allergies changes across the transect
3.3 STUFF THAT COLLECTS DATA
3.3.1 light meter
3.3.1.1 a sensor that accurately measures the levels of light, jolly spiffing when comparing plants in areas with different areas of light and similarly minded endeavours
3.3.2 quadrat
3.3.2.1 a square frame sometimes divided into a grid of 100 smaller squares that can make data collection quicker, easier and EXTRA FUN, eg. you could estimate the percentage cover of a plant species on the ground by counting howmuch of the quadrat is covered by the species - you count a square si c'est plus que half-covered
3.3.3 identification key
3.3.3.1 kinda self explanatory, an identification key (like the one above) is a series of questions to work out what something is - as you work your way through the questions, you narrow down your options until you are left with the right answer
3.3.3.1.1 IDENTIFICATION KEY for identifying the people in the beautiful image to our left, taken in our hotel in Rome
3.3.3.1.1.1 Q1: does the person have his eyes open?
3.3.3.1.1.1.1 YES: it's Callum
3.3.3.1.1.1.2 NO: continue...
3.3.3.1.1.1.2.1 Q2: is the person's t-shirt choice intended to annoy the locals?
3.3.3.1.1.1.2.1.1 YES: it's Matthew
3.3.3.1.1.1.2.1.2 NO: continue...
3.3.3.1.1.1.2.1.2.1 Q3: is the person clearly visible?
3.3.3.1.1.1.2.1.2.1.1 YES: it's Lewis
3.3.3.1.1.1.2.1.2.1.2 NO: it's Ian, in super sneaky ninja stealth mode