EXCRETION in flowering plants Flashcards
Topic 2 i
waste products or substances in excess inside a plant include (4)
- oxygen
- carbon dioxide
- water / water vapour
- other unwanted chemical substances
are oxygen and carbon dioxide reactants or waste products in a plant ?
can be both
The amount or _____ affects the waste products within plants
intensity of light
during the day, when there is enough light, the rate of photosynthesis is
higher then the of respiration
during the day what is the waste product
oxygen because more oxygen is released than CO2
During the night, when there is insufficient light, there in NO photosynthesis so
there is respiration, and carbon dioxide is produced
during the night, what is the waste product and why
CO2, because as there is no photosynthesis, no CO2 is being used up and so is in excess
the gas in excess does what through what to get out of the plant
diffuses through the leaf organ
is the majority of water vapour lost from a plant a waste product of metabolism ?
why
no, because it is water that has been drawn up from the roots in the transpiration stream
plant cells break down molecules into _____ substances when
chemical substances
when they’re no longer needed by the plant
some chemical substances cannot be converted into useful compounds so must …
be removed from the plant
how are useless substances gotten rid of
they’re stored in dying tissue of the plant
when the dead tissue falls off, then the substances are removed
