CO2 is present in……
a) soil
b) air
c) sunlight
d) all
CO2 is the raw material for …..
a) respiration
b) decomposition
c) photosynthesis
d) all of them
CO2 is diffused from the outside air into the intercellular space by…..
a) stomata
b) roots
c) xylem
d) phloem
Stomata are small pores particularly present in the……
a) roots
b) stem
c) upper side of leaf
d) lower side of leaf
Each stoma is guarded by two……..cells.
a) guard
b) companion
c) epidermal
d) mesophyll
Where the exchange of CO2 and oxygen takes place leaf?
a) intracellular space
b) intercellular space
c) inside the inside the midrib
d) all of these
