JAMB - Biology (2009 - No. 39)
Use the diagram above to answer this question.
The part labelled l is the
spongy mesophyll
upper epidemis
cuticle
vein
설명
Plant cuticle is the outermost layer of plants, which covers leaves, fruits, flowers, and non-woody stems of higher plants.
It protects plants against drought, extreme temperatures, UV radiation, chemical attack, mechanical injuries, and pathogen/pest infection.