To escape into the air, a petunia’s scent molecules, called volatile organic compounds (VOCs), have to travel through their cells’ cytoplasm, cross an inner membrane and then the cell wall, and ...

When you see greens start to turn damp and brown, this means the outer waxy cuticle has broken down, and the leaves' inherent moisture is seeping out. Oil easily wilts greens by breaking through ...

The cross-section of a leaf reveals its complex structure. The waxy cuticle surface on the outside protects the leaf and prevents excess water loss. The palisade cells at the upper side are packed ...