An aphid is an insect that has mouthparts to sip plant sap. When placed on an herbaceous stem, it soon has its mouthparts embedded and is withdrawing plant sap. What layer of cells has the aphid's mouthparts tapped?

A) xylem
B) phloem
C) parenchyma
D) trichomes
E) collenchyma

Phloem

The vascular tissue in plants that transports sugars and other metabolic products from leaves to other parts of the plant.

Parenchyma

A type of plant tissue comprised of living cells that are often soft and fleshy, involved in photosynthesis, storage, and transport.

Trichomes

Small hair-like appendages on plants that serve various functions including defense against insects and reducing water loss.