WebbPine is a gymnosperm and plants belonging to this group do not have vessels, instead they have tracheids. ... Phloem lacks companion cells and have albuminous cells. Phloem has companion cells and lack albuminous cells. Page No 31: Question 5: Epidermal cells are often modified to perform specialized functions in plants. Webb4. Vascular tissue i.e xylem and phloem are present. Xylem lacks vessels but tracheids are present. In phloem sieve tubes and companion cells are absent. 5. Asexual reproduction takes place by spores. 71 6. Most pteridophytes are homosporous i.e …
Phloem Definition, Function, Examples, & Facts
Webb4 maj 2024 · The phloem rays consist of plump, thin-walled parenchyma cells. Within the secondary phloem is the thin vascular cambium, which divides to produce secondary phloem externally and secondary xylem internally. Next are several thick layers of secondary xylem, which contain wide, thick-walled vessel elements. WebbBoth angiosperms and gymnosperms have vascular systems consisting of xylem and phloem. The difference between them is that the vascular system is slightly less … green leather dye
BIO 112 GENERAL BIOLOGY II Plant diversity LECTURE NOTE.docx
WebbUnderstanding the mechanisms of phloem loading in gymnosperm trees will cast light on the evolution and significance of long distance transport mechanisms in land plants, just … WebbPhloem in gymnosperms lacks Easy A Both sieve tubes and companion cells B Albuminous cells and sieve cells C Sieve tubes only D Companion cells only Solution Gymnosperms … Webb29 maj 2024 · Xylem lacks true vessels in Pteridophytes. ... In phloem, sieve cells are present, companion cells and sieve tubes are absent in pteridophytes. 6. In angiosperms, … green leather elbow patches