Waec GCE Biology questions and answers 2022

Here we will be posting the waec  Biology  answers for 2022

bii)
Elimination
It is the removal of indigestible wastes through the anus, in the form of feces,
biii)
*Excretion* is a process, act or function of discharging or ejecting waste product of metabolism, especially from the system of an organism.
Conversely, egestion is the removal of undigested wastes by discharging or expulsing them from the digestive tract via the anus.
ROLE OF STOMATA IN TRANSPIRATION
In photosynthesis, it acts as the organ for gaseous exchange, whereas during transpiration, it acts as an organ for transportation. During transportation, the excess of water loss is monitored by the opening and closing of stomata.
Five stages of holozoic nutrition in human
I) Ingestion.
II) Digestion.
III) Absorption.
IV) Assimilation.
V) Egestion.
 
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