Polarity in regeneration, Biology

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.

Posted Date: 2/5/2013 12:46:19 AM | Location : United States







Related Discussions:- Polarity in regeneration, Assignment Help, Ask Question on Polarity in regeneration, Get Answer, Expert's Help, Polarity in regeneration Discussions

Write discussion on Polarity in regeneration
Your posts are moderated
Related Questions
Define and compare bone modeling and remodeling Bone modeling is a surface-specific activity (apposition or resorption) that produces a net change in the sie and/or shape of a

This process involves the regulation of the concentration of the body fluids through control of water content and salt content of the blood. If a person loses water from their bloo

Explain Acute Renal failure Acute Renal failure:  Renal failure associated with burns or other trauma or with sharp infection or obstruction of the urinary tract.

Q. What is Barr body Genes? Located inside nuclear envelope, it's a densely staining object which is an inactivated X chromosome in female mammalian cells. Most Barr body genes

What is the process of Breathing? Oxygen is supplied to the blood, and carbon dioxide is removed from the blood by the process known as breathing. Air is moved into an exchan

give the discriptive account of nerilla which belongs to class arciannelida in phylum annelida

Direct demonstration of the causative agent by electron microscopy (EM): Where facilities for electron microscopy are available and a viral disease is suspected, presence o

Light - Marine Ecosystems Light is a limiting factor in the ocean as it contributes significantly to organic production and distribution of marine life. The ocean is divisible

Define the Healing Process - Root Canal Treatment The course of healing varies and depends on: 1)  Initial size of the lesion: It takes longer for larger periradicular lesio

Light Stress in Chloroplasts As mentioned earlier, very high light intensity can inhibit photosynthesis due to accumulation of excess of excitation energy. A portion of this r