Types of metamorphic changes, Biology

Types of Metamorphic Changes

The process of metamorphosis includes reactivation of the morphogenetic processes. The morphogenetic changes also the mode of causation of these changes vary in different animal groups. The degrees of changes that take place during metamorphosis depend on the degree of difference between the larva and the adult forms. For instance, in urodele amphibians (newts) and hemimetabolous insects (cockroach), larva and adult show some differences. The metamorphic changes are comparatively less and metamorphosis is said to be gradual or incomplete. Conversely, in anuran amphibians (frogs) and holometabolous insects, where differences among the larva and adult are enormous, the changes during metamorphosis are extensive and drastic.

This kind of metamorphosis is called radical or complete metamorphosis. The changes throughout metamorphosis include those of structural, physiological and biochemical nature. These are marked through disintegration and atrophy of some structures, cellular death in some tissues, morphogenesis and differentiation of certain new structures and remodeling of some another. These alterations of metamorphosis in at least some groups of animals (insects, crustaceans, amphibians) are known to be controlled by hormones that serve as the causative agents of metamorphosis.

Posted Date: 1/30/2013 5:49:22 AM | Location : United States







Related Discussions:- Types of metamorphic changes, Assignment Help, Ask Question on Types of metamorphic changes, Get Answer, Expert's Help, Types of metamorphic changes Discussions

Write discussion on Types of metamorphic changes
Your posts are moderated
Related Questions
Define Metabolic Aberrations and Clinical Manifestations? The state of obesity brings about certain alterations in the normal body processes which are enumerated herewith and h

Solar Tracking - Nastic and Epinastic Responses Many plants such as sun flowers are capable of solar tracking in which the flat blade of leaves or inflorescence will remain a

expanciate the process of oxygen and carbon dioxide exchange in sponges

List out the Principles of Food Preservation? All food preservation methods are based upon the general principle of preventing or retarding the causes of spoilage caused by mic

Q. What is Intermediate acting insulin? Intermediate acting: This type works more slowly than short acting. It works hardest 8-12 hours after injection and still keeps on worki

Class Hirudinea - Classification of Coelom These are leeches. Number of body segments of these types of animals is fixed; usually there are 34 segments in a few groups there m

A fire hose ejects a stream of water at an angle of 38.8 ° above the horizontal. The water leaves the nozzle with a speed of 26.6 m/s. Assuming that the water behaves like a projec

Evolution of Metazoa The sponges, coming under phylum Porifera are the closest to Protista, and can perhaps be regarded even as a colony of protists rather than being multicel

Question 1 List the differential staining techniques used in microbiology laboratory. Explain Gram staining technique in detail. Add a note on modifications of Gram staining and a