The term 'keel' is used for special type of
Sepals
Petals
Stamenstellen
Carpels
B.
Petals
Keel is a special type of petal found in the papilionaceous type of Corolla. Papilionaceous type is a butterfly like the Corolla has one large posterior standard, two lateral wings, two innermost and smaller keels.
The term 'bark' refers to
Phellem, phelloderm and vascular cambium
Periderm and secondary xylem
Cork cambium and cork
Phellogen, phellem, phelloderm and Secondary phloem
Light reaction in stroma lamellae of the chloroplast results in the formation of
NADPH
ATP + NADPH
ATP K
O2
In leaves of Ce plants, malic acid synthesis during CO2 fixation occurs in
Bundle sheath
Mesophyll
Epidermis
Guard cells