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

Does ascaris lumbricoides present an intermediate host, Q. Does Ascaris lum...

Q. Does Ascaris lumbricoides present an intermediate host? An Ascaris is a monoxenous parasite, its life cycle is dependent only on one host and so it doesn't have intermediate

Phylum Coelenterata, what is its description and 3 most common example

what is its description and 3 most common example

Which are the germ layers present in cnidarians, Q. Which are the germ laye...

Q. Which are the germ layers present in cnidarians? Which tissues of the animal do they originate? These beings present endoderm and ectoderm, two germ layers. Animals only wit

Explain animal fats, Animal Fats This group consists of depot fats from...

Animal Fats This group consists of depot fats from domestic land animals (e.g., lard and tallow), all containing large amounts of C16 and C18 fatty acids, medium amounts of uns

Extended point within pulp chamber-endodontics principles, Extended point w...

Extended point within pulp chamber: Gripping action: -    Steglitz forceps or pin pilers. -    Access cavity flooded with chloroform to dissolve the sealer. -    Grasp the

Senescence - effects of plant growth regulators, Senescence - Effects of Pl...

Senescence - Effects of Plant Growth Regulators on Development All five major growth regulator groups: auxins, gibberellins cytokinins, abscisic acid and ethylene can influenc

Nutrition management goals for oesophagitis, Q. Nutrition Management Goals ...

Q. Nutrition Management Goals for oesophagitis? The objectives of nutritional care include the following: 1. Prevention of irritation of the inflamed oesophageal mucosa (in

Explain potential effect of nutrient and drug interaction, Explain Potentia...

Explain Potential Effect of Nutrient and Drug Interaction? The extent of the effects of any food and drug interaction call varies. Potential effects depend on the dose and the

Explain what is organismal ecology, Explain what is Organismal Ecology? ...

Explain what is Organismal Ecology? Ecology at the Level of Individuals: We define ecology as the study of the relationships between organisms and the relationships between o

How is claimant need to make balance of probability, How is claimant need t...

How is claimant need to make balance of probability? When there is no loss suffered through a person after that there cannot be a civil proceeding not like under criminal law t

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