![Assertion: Long distance flow of photoassimilates in plants occurs through sieve tubes. Reason: Mature sieve tubes have parietal cytoplasm and perforated sieve plates. Assertion: Long distance flow of photoassimilates in plants occurs through sieve tubes. Reason: Mature sieve tubes have parietal cytoplasm and perforated sieve plates.](https://search-static.byjusweb.com/question-images/byjus/ckeditor_assets/pictures/747810/original_10.png)
Assertion: Long distance flow of photoassimilates in plants occurs through sieve tubes. Reason: Mature sieve tubes have parietal cytoplasm and perforated sieve plates.
![Phloem with sieve tube members and companion cells in cross section of Zea stem - UWDC - UW-Madison Libraries Phloem with sieve tube members and companion cells in cross section of Zea stem - UWDC - UW-Madison Libraries](https://asset.library.wisc.edu/1711.dl/3HOXWMI372RW48W/M/h1380-e0ee9.jpg)
Phloem with sieve tube members and companion cells in cross section of Zea stem - UWDC - UW-Madison Libraries
![sieve-tube grouping and distribution, transverse sections.-9: sieve... | Download Scientific Diagram sieve-tube grouping and distribution, transverse sections.-9: sieve... | Download Scientific Diagram](https://www.researchgate.net/publication/311648909/figure/fig3/AS:635116573446148@1528434999953/12-sieve-tube-grouping-and-distribution-transverse-sections-9-sieve-tubes-soli-tary.png)
sieve-tube grouping and distribution, transverse sections.-9: sieve... | Download Scientific Diagram
![Adventures with animals and plants. Biology. PROBLEM 2. The Part Stems ajtd Roots Play in Making Food 153 x'Vlong the outer portion of the vas- cular cyhnder lie tissues known as Adventures with animals and plants. Biology. PROBLEM 2. The Part Stems ajtd Roots Play in Making Food 153 x'Vlong the outer portion of the vas- cular cyhnder lie tissues known as](https://c8.alamy.com/comp/RR25Y0/adventures-with-animals-and-plants-biology-problem-2-the-part-stems-ajtd-roots-play-in-making-food-153-xvlong-the-outer-portion-of-the-vas-cular-cyhnder-lie-tissues-known-as-phloevi-flow-em-in-the-phloem-are-several-kinds-of-cells-those-of-special-interest-are-the-sieve-tubes-a-sieve-tube-is-a-row-of-long-narrow-cells-which-remain-alive-in-this-respect-sieve-tubes-are-different-from-the-xylem-tubes-holes-appear-in-the-walls-at-the-top-and-bottom-of-each-cell-so-that-these-walls-look-like-sieves-strands-of-cytoplasm-pass-through-the-sieve-from-cell-to-cell-between-the-phloem-an-RR25Y0.jpg)