Types of metamorphic changes, Biology

Assignment Help:

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.


Related Discussions:- Types of metamorphic changes

Effect on microbial growth and ecology, Effect on Microbial Growth and Ecol...

Effect on Microbial Growth and Ecology Redox potential exerts an important selective effect on the microflora of a food since it will decide the type of microorganism that can

Mouse bioassay and mongoose bioassay, Question: (i) Which species of m...

Question: (i) Which species of microalgae are associated with ciguatera fish poisoning? (ii) Name five fish species generally implicated in ciguatera fish poisoning in Mau

Estimate the frequency of heterozygotes for allel, Phenylketonuria is a sev...

Phenylketonuria is a severe form of mental disability caused by a homozygous recessive allele. The condition affects about 1 in 10,000 neborn Caucasians. Estimate the frequency of

What is dip stick test, What is Dip Stick Test It is a rapid method of ...

What is Dip Stick Test It is a rapid method of detection of Ketone bodies which you can perform easily. Plastic strips impregnated with a buffered mixture of sodium nitropru

Coarctation of aorta, Careful palpation of the upper and lower limb pulses ...

Careful palpation of the upper and lower limb pulses would make one suspect coarctation as the cause of hypertension. The lower limb pulses are weak and delayed. Confirmation ca

Explain poor growth - clinical signs of kwashiorkor, Explain Poor growth - ...

Explain Poor growth - clinical signs of kwashiorkor? Growth retardation is the earliest manifestation of kwashiorkor, the child will be lighter and shorter than its normal peer

Reproduction, what is the arrangement of microtubules in the sperm

what is the arrangement of microtubules in the sperm

Show the error detection and editing function, Q. Show the Error Detection ...

Q. Show the Error Detection and Editing Function? Error Detection and Editing Function: Consciousness helps us avoid acting solely through habit. It allows us to make novel res

What type of light-sensitive cell is present in this region, a) Which regio...

a) Which region of the retina gives the most accurate interpretation of the image? b) What type of light-sensitive cell is present in this region?   (a) The fove

Define function of the iron uptake by cells, Define Function of the Iron Up...

Define Function of the Iron Uptake by Cells? Iron has several vital functions in the body. It serves as a carrier of oxygen to the tissues from the lungs by red blood cell haem

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