B8 - Photosynthesis Flashcards
photosynthesis =
carbon dioxide + water = glucose + oxygen
where does the CO2 come from
the air, enters through the stomata by diffusion
where does the water come from
comes from the ground absorbed through the roots by osmosis
what happens to the glucose formed
converted to compounds such as cellulose, fructose, starch, sucrose, plant oil
what happens to the oxygen formed
released into the atmosphere through diffusion
sucrose
to transport sugar
plant oil
reserve of high-energy food for use by the germinating seed
cellulose
for support in the cell wall
fructose
for fruit and nectar - to make it sweet and attract spreaders
starch in plants
to store energy
test for oxygen
glowing splint test
why do plants need to produce oxygen
for its own respiration as well as releasing oxygen for other organisms to respire
test for starch
iodine - observe colour change from brown/orange –> black/blue
what happens if you leave plants in the dark for a prolonged period of time
the plant uses up all of its energy stores of starch that is stored in the plant for when there is no sunlight energy
what is the role of soda lime
used to remove CO2
