Unit 3: Concept 4B - Chemosynthesis Flashcards
chemosynthesis
process of an organism making its own food using chemicals instead of sunlight
rate of photosynthesis
light intensity,
amount of CO2,
temperature
light intensity
excites more e- causing light reactions to happen faster
amount of CO2
more ingredients to work with the process through cycle
temperature
increased temperature accelerates chemical reactions to a degree
why do root cells in a plant not need chloroplasts?
chloroplasts catch sunlight; since roots are underground, they are NOT exposed to the sun,
therefore, they cannot complete photosynthesis
alternate pathways
stomata and photorespiration
stomata
pores on underside of leaf,
when it is too hot/dry, plant will close stomata so it doesn’t lose too much water
photorespiration
CO2 drops, levels of O2 increase,
adds oxygen to Calvin Cycle instead of CO2,
makes NO sugar or ATP, detrimental to plant
two types of photosynthesis
CAM and C4
CAM
opens stroma at night and closes during the day (opposite of normal plants),
plants grow slower
C4
partially closes stomata during the hottest part of the day,
only needs 1/2 as much water than normal plants