Polarity in regeneration, Biology

Assignment Help:

Polarity in Regeneration

A distinct polarity or gradient exists in planarians (and in other animals). The meaning of this is that in any piece or segment of the body; its anterior end (head end) represents one pole and the posterior end (tail end) represents another pole. Regeneration is generally correlated with this polarity. In any excised piece the cut surface towards the head end generates a new head and the cut surface towards the hind end produces a tail. In the remaining non-chordate phyla (that is Aschelminthes, Arthropoda and Molluscs) regeneration of missing parts is minimal, and asexual reproduction including regeneration is almost non-existent.


Related Discussions:- Polarity in regeneration

Phototherapy, Phototherapy As you know exposure of the jaundiced infa...

Phototherapy As you know exposure of the jaundiced infant to blue, white or green light is effective in reducing the serum billirubin level. When bilirubin absorbs light, ser

Explain about the deuteromycota - fungi, Explain about the Deuteromycota - ...

Explain about the Deuteromycota - Fungi? Deuteromycota - Deuteromycetes or fungi imperfecti reproduce by means of conidia. These have either lost the capacity for sexual reprod

Rigs pattern - types of nursing units, Rigs Pattern: The nursing unit ...

Rigs Pattern: The nursing unit has been divided into small cubicles for 1,2,4  and 6 beds.  The beds are arranged parallel to the  longitudinal wall.  The pattern was first bu

Explain the nutrition of women during pregnancy, Explain the Nutrition of W...

Explain the Nutrition of Women during Pregnancy? During the post-war years, the people in the developed world recognized that women were at a disadvantaged position and felt th

Define proteins as regulators of water balance, Define Proteins as regulato...

Define Proteins as regulators of water balance? As substrates and solutes are transferred or exchanged across membranes, water has a tendency to follow to maintain equal osmoti

Disinfectant, General information about disinfectants A disinfectant is...

General information about disinfectants A disinfectant is a chemical that kills disease-causing agents on contact. Natural disinfection agents, such as sunlight, heat, keeping

Explain adverse effects of caspofungin, Explain Adverse Effects of Caspofun...

Explain Adverse Effects of Caspofungin Although generally well tolerated, caspofungin occasionally causes rash, fever and mild hepatic toxicity (Medical Letter 2001; 43:58). An

Explain the properties of gum tragacanth, Explain the Properties of Gum tra...

Explain the Properties of Gum tragacanth Gum tragacanth swells in water to give thick  viscosity dispersions or pastes similar in texture to soft gels. The viscosity shows a sh

State problem of hypoglycaemia when driving, Hypoglycaemia When Driving ...

Hypoglycaemia When Driving Hypoglycemia is particularly dangerous if it happens to someone who is driving. People with hypoglycemia may have trouble concentrating or se

What is surgical therapy, Surgical Therapy The clinician may use a surg...

Surgical Therapy The clinician may use a surgical approach when non-surgical therapies are not indicated or are unsuccessful. The surgical techniques are modified from those

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