Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
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.
ENZYMES IN CLINICAL DIAGNOSIS The rationale for measuring plasma or serum enzyme levels is based on the premise that these levels reflect changes that have occurred in a
Define Interaction of pyridoxine with Ascorbic acid and Leucine? Ascorbic acid: Vitamin B 6 metabolism increases with. Higher levels of vitamin C intake. Whole blood a
Q. What is severity of the oesophagitis? The severity of the oesophagitis resulting from oesophageal reflux is determined by the content of gastric reflux mucosal resistance,
Could any of the following features be useful in a gateway vector; (i) Origin of replication (ii) multiple cloning site (iii) blue/white selection (iv) M13 forward and rev
Q. What is meant by the arch reflex? In some situations the movement of the skeletal striated muscles does not depend upon commands of the superior motor neurons that it is not
Explain about the Electrophoresis? Electrophoresis refers to the movement of charged particles because of an external electric field. Because charged molecules can be made to m
Define the term Archenteron ? The name given to the primitive gut, the first tube that runs through the developing embryo and is open to the external environment. Formed during
What is Oral Hygiene An index can be used to evaluate the oral hygiene level in the patient e.g. Oral hygiene Index (Green and vermilion) or Plaque index (Silness and Loe). An
Two gene loci, A and B, assort independently, and alleles A and B are dominant over alleles a and b. Indicate the probability of producing: An aB phenotype from a cross AaBb x AaBB
Define Regulation of amino acid levels in the blood? Regulation of amino acid levels in the blood: Vitamin D helps to prevent loss of amino acids through the kidney and thus
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd