Metamorphosis, Biology

Assignment Help:

Metamorphosis

The phenomenon of metamorphosis is described as a process during development which involves a remarkable change in morphology and physiology of the larva, so that it is transformed into an adult with totally different morphology and physiology, often for life in a different habitat. In many such type of animals undergoing metamorphosis, the larva is usually very different from the adult. The best known instances are tadpoles of frogs, caterpillar of butterflies and moths, tadpole larva of ascidians, several larval types of crustaceans, ciliated trochophores of marine annelids and molluscs etc; actually sow times the difference between the larva and adult is so great that with no knowing the origin of the egg, or without following the young one by its full development, it would be next to impossible to know that the young and the adult are of similar species.

In the past such differences have sometimes led to the larva and adult of similar species being assigned to different taxonomic groups. For instance the larva and adult of the axolotl Ambystoma (Urodele - amphibia) and Tribegulians of blister beetle (Inasecta) till quite freshly were mistakenly assigned to different species. Much More than a century ago, only the study of metamorphosis of the tadpole larva of ascidians could decide that the ascidians belong to Phylum Chordata. The changes that take place due to metamorphosis relate often to a change in habitat with a corresponding alter in the organisms structure and other features. For example, in sea urchins, there take place a change from planktonic to benthic existence, in frogs and toads from an aquatic to a terrestrial mode of life and in insects from a non-flying to a flying life.

 


Related Discussions:- Metamorphosis

Explain the elimination of dna helicase activity in a cell, Which of the fo...

Which of the following results from the elimination of DNA helicase activity in a cell? A. The melting of the DNA double helix at the site of replication initiation will fail t

Define briefly about the pyridoxine vitamin, Define Briefly about the Pyrid...

Define Briefly about the Pyridoxine vitamin B 6 ? Pyridoxine or vitamin B 6 is one of the B complex vitamins which prevents and cures dermatitis in rats fed on vitamin B 6 de

Explain about vascular cambium, How can the age of a tree be estimated from...

How can the age of a tree be estimated from the analysis of the rings present on a cross section of its stem? For the growth of the tree it is essential to have formation of ne

What is sulphonylureas, Q. What is Sulphonylureas? Sulphonylureas: Tolb...

Q. What is Sulphonylureas? Sulphonylureas: Tolbutarnide is the mildest and its effect remains for 8 hours hence 2-3 doses need to be taken. Another drug chlorpropamide needs on

Describe why the bile acids are much better suited, All of the following il...

All of the following illustrate why the bile acids are much better suited then cholesterol for use as emulsification agents for fats except: -cholesterol contains a hydroxyl gro

Ciguatera fish poisoning, Q. Explain Ciguatera Fish Poisoning? Ciguater...

Q. Explain Ciguatera Fish Poisoning? Ciguatera probably represents the most common cause of poisoning from fish in tropics. Ciguatera comprises over 50% of all reported case

Explain adverse effects of oseltamivir, Explain Adverse Effects of Oseltami...

Explain Adverse Effects of Oseltamivir  Nausea and vomiting can occur. Taking the drug with food decreases the incidence of nausea. In juvenile rats, very high doses of osel

Explain diagnosis of root perforation, Explain Diagnosis of Root Perforatio...

Explain Diagnosis of Root Perforation 1- Exploration: Continuous bleeding if the defect touched during cleaning and shaping lead to difficult vision. Difficult to d

Cardio pulmonary resuscitation, CARDIO PULMONARY RESUSCITATION: Cessat...

CARDIO PULMONARY RESUSCITATION: Cessation of cardiac activity is determined by  inability to palpate a central pulse,  unresponsiveness and Gnea. CPR consists of  measures for

How dietary constituents affecting the calcium absorption, How dietary cons...

How dietary constituents affecting the calcium absorption? Several dietary constituents have an effect on calcium absorption. The differences in fractional absorption from diff

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