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

Accidents in industry workplace, Accidents in Industry Workplace It is...

Accidents in Industry Workplace It is a hard fact to bear in mind that accidents in industry workplace are to be avoided or discarded and efforts in this direction has been in

Primary production - ecosystem, Primary Production - Ecosystem Energy ...

Primary Production - Ecosystem Energy accumulated by plants during photosynthesis is called production or more specifically primary production. It is the first and the basic f

Explain the the lysogenic cycle in diversity of life, Explain the The Lysog...

Explain the The Lysogenic Cycle in diversity of life? The Lysogenic Life History of Bacteriophage Viruses. Even though viruses are structurally simple, consisting of merely a n

Bergmann's method of cell plating, Bergmann's Method of Cell Plating I...

Bergmann's Method of Cell Plating In this method free cells are suspended in a liquid medium at a density twice the finally desired plating density. Melted agar containing med

What does ecological niche of an organism represent, a) Mention the scienti...

a) Mention the scientific term used for modified form of reproduction in which seeds are produced without fusion of gametes. b) What does ecological niche of an organism represe

To study if bacteria grow better where it is warm or cold, To study if bact...

To study if bacteria grow better where it is warm or cold Again inoculate two sterile dishes. Label one 'warm'  and the other 'cold'. Place the 1st dish in a dark warm place an

Children with infective endocarditis, Among neonates, IE typically involves...

Among neonates, IE typically involves the tricuspid valve of structurally normal hearts and is associated with very high mortality rates.  It is likely that many of these episodes

Define secondary level care - public nutrition, Define Secondary level care...

Define Secondary level care - public nutrition? More complex health problems of the community are resolved at the secondary level care through the district hospitals and the Co

Why is vision important for life on earth, Q. What is vision? Why is vision...

Q. What is vision? Why is vision important for life on earth? Vision is the ability of some living beings to distinguish, to perceive and to interpret luminous stimuli. Visi

Types of surgery, Types of Surgery :  Tricuspid valvotomy is done as an op...

Types of Surgery :  Tricuspid valvotomy is done as an open procedure at the end of surgery on mitral and/or aortic valve. It can be done on an arrested heart or on a beating heart

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