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

Water potential, why psi g is ignored in water potential of plants?

why psi g is ignored in water potential of plants?

Hutchinsons system of classification, Q. Hutchinsons System of Classificati...

Q. Hutchinsons System of Classification? John Hutchinson, a renowned British Botanist proposed 24 phyletic dicta or principles and based on these dicta he published a phylogene

Loss-of-function mutations, Choose the correct answer. A. The phenotype det...

Choose the correct answer. A. The phenotype determines the genotype. B. True-breeding individuals are produced by repeated backcrossing. C. Recessive alleles are usually loss-of-fu

An insect collecting net, An insect collecting net A useful insect net ...

An insect collecting net A useful insect net can be made from a round stick such as a broom or mop handle, some heavy wire and mosquito netting or cheese cloth. Bend a heavy pi

How much physical activity is enough, How much physical activity is enough?...

How much physical activity is enough? Although it is difficult to prescribe the optimum amount of physical activity, it is important to note that any exercise programme has to

Explain kidney transplant, Consider the following four statements (a - d) r...

Consider the following four statements (a - d) regarding kidney transplant and select the two correct ones out of these. 1. Even if a kidney transplant is proper the recipient m

What is the difference between rna and dna, Q. Concerning the nitrogen- con...

Q. Concerning the nitrogen- containing bases that participate in nucleotides, what is the difference between RNA and DNA? In DNA nucleotides can be formed of thymine (T), adeni

Diagnosis of lyme disease, Diagnosis of lyme disease In endemic areas, ...

Diagnosis of lyme disease In endemic areas, Lyme disease is diagnosed by recognition of erythema migrans. IgG antibodies to B. burgdorferi are usually detectable 4 to 6 weeks a

Pathogenesis, The interactions between the human host and selected microorg...

The interactions between the human host and selected microorganisms that culminate in IE involve the vascular endothelium, hemostatic mechanisms, the host immune system, gross anat

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