phloem structure

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4 Terms

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sieve tubes

most organelles lost: interior free to transport phloem sap.

2
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sieve plates

large pores: allows phloem sap to move between cells.

3
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What is an issue with sieve tubes not having organelles?

It isnt able to produce essential molecules such as ATP.

4
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companion cells

has nucleus and a lot of mitochondria so it can provide essential molecules to sieve tubes via plasmodesmata