| Sieve cell | Sieve tubes |
|---|---|
| $(1)$ In Gymnosperms,it is a unicellular element. | $(1)$ It is a multicellular element found in Angiosperms. |
| $(2)$ It possesses a nucleus. | $(2)$ It lacks a nucleus at maturity. |
| $(3)$ Sieve areas are less specialized and scattered. | $(3)$ The end walls are modified into sieve plates with large pores. |
| $(4)$ Food transport capacity is relatively low. | $(4)$ Food transport capacity is significantly higher. |
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