Transport System Role and Structure (OCR A-Level Biology A): Flashcards
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Form in which glucose is transported in plants
Form in which glucose is transported in plants
Sucrose (non-reducing, less reactive)
Substances transported by xylem
Substances transported by xylem
Water and dissolved mineral ions upward
Substances transported by phloem
Substances transported by phloem
Nutrients (photosynthates, amino acids) bidirectionally
Xylem vessel cell viability at maturity
Xylem vessel cell viability at maturity
Dead cells with no cytoplasm
Lignin function in xylem
Lignin function in xylem
Strengthens walls, waterproof, provides structural support
Pits in xylem vessels
Pits in xylem vessels
Unlignified areas allowing lateral water movement
Sieve tube element nucleus presence
Sieve tube element nucleus presence
Absent (no nucleus)
Companion cell function
Companion cell function
Support sieve tube elements with proteins and ATP
Plasmodesmata definition
Plasmodesmata definition
Channels through cell walls connecting cytoplasm of cells
Lignin thickening patterns in xylem
Lignin thickening patterns in xylem
Annular (ring), spiral, reticulate, pitted