Task: Class Definition Understanding (ontology: Food_Agriculture/Crop_Ontology)

Which of the following definitions best describes 'Guard cells per stoma on abaxial (top) leaf surface'?

A. Count days from germination to first observation of apical bud
B. Guard cell number on the abaxial leaf surface
C. Rank of the highest wilted leaf. the rank is measured starting from bottom, all leaves are included (green, yellow or dry). the cotyledon are not accounted for.
D. the concept (starting from bottom).

Answer: Guard cell number on the abaxial leaf surface