Loading and unloading of sieve tubes, Biology

Assignment Help:

Loading and Unloading of Sieve Tubes

In order to understand the loading of food from manufacturing leaf cells to sieve tubes we must examine the anatomy of a minor vein shown in Figure. We can see

2234_Loading and Unloading of Sieve Tubes.png

Figure: A cross-section of a minor leaf vein.  (MC-Mesophyll  Cell, XE -Xylem Elements, SE-Sieve Element, TC-Transfer  Cells, PP-Phloem  Parenchyma  cell.

a xylem vessel (X), two sieve elements (SE) which are relatively smaller than other cells and without cytoplasm, the modified companion cells or transfer cells (TC) with dense cytoplasm and phloem parenchyma (PP) which is less dense and vacuolated.


Related Discussions:- Loading and unloading of sieve tubes

Tagmatization, sample assignment on tagmatizatio

sample assignment on tagmatizatio

Bty100, 1. (a) Which physicochemical properties need to be regulated by the...

1. (a) Which physicochemical properties need to be regulated by the cell? Define chemical equilibrium and discuss how it is maintained by the cell. (b) Differentiate between facili

Chromosomes and molecular homology, CHROMOSOME S AND MOLECULAR HOMOLOGY - ...

CHROMOSOME S AND MOLECULAR HOMOLOGY - The DNA content of diploid cells is similar. Hoyer et al in 1965 showed that DNA of humans was 100% similar with chimpanzee and 94%

Canned and retort pouched meat products, C a nned and Retort Pouched Meat...

C a nned and Retort Pouched Meat Products Canning as a process contributes to preservation, storage and distribution of food supplies. Production of thermally processed meat

Nemerteans - regeneration in invertebrates, Nemerteans - Regeneration in In...

Nemerteans - Regeneration in Invertebrates Nemerteans as well possess remarkable regenerative ability, as even a small fragment can regenerate into a complete worm. Nemerteans

Explain cardiac type of tapvc, Explain Cardiac Type of TAPVC (Draining into...

Explain Cardiac Type of TAPVC (Draining into Coronary Sinus) ? Initial steps of the operation are the same as described earlier. The right atrium is opened and the roof of the

Explain the results of coarctation of aorta, Explain the Results of Coarcta...

Explain the Results of Coarctation of Aorta? Early hospital death in isolated coarctation is around 2 to 10 per cent. In many reports, mortality for older babies approaches 0.

Viral diseases - avian encephalomyelitis, V i ra l Diseases A v ...

V i ra l Diseases A v ian encephalomyelitis This is enterovirus disease of chicken, pheasants, turkeys and Japanese quails caused by the member of the family Pi

Explain group specificity, Group  specificity Some enzymes prefer a sp...

Group  specificity Some enzymes prefer a specific functional group to be present\%on  the substrate molecules. Example:- alcohol dehydrogenase  acts on alcohols having  -OH  gr

Meosis, briefly describe the eggs and follicles

briefly describe the eggs and follicles

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd