Idk anything right now, I’ll comment the answer later
There are holes in the end of the phloem tubes because Phloem consists of sieve tube cells and companion cells for conduction of food These sieve elements are placed end to end . At the the junction of two sieve elements there is a plate called sieve plates having circular pores.
Answer:
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It is because convergent evolution represents the independent evolution of similar features in species that don't have the same ancestor. In this case filamentous body forms evolved independently, but have the same function: an adaptation for a nutrition of decomposers.
