A-Level Biology OCR A
Sieve Adaptations Tube Elements Cytoplasm Assimilates Lots Companion
| Front |
Describe the adaptations of phloem. |
| Back |
Adaptations of phloem:- Sieve tube elements - no nucleus & no/small amount cytoplasm to allow transport of assimilates more easily
- Sieve plates allow assimilates to pass thru phloem tubes
- Lots of plasmodesmata between companion cells, lots of mitochondria & dense cytoplasm in companion cells, to allow them to fulfill sieve tube elements with metabolic needs
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A-Level Biology OCR A