Induction in metamorphosis, Biology

Assignment Help:

Induction in Metamorphosis

Some of the morphogenetic changes throughout metamorphosis are found fo be quite independent of hormone action. For instance, generally during metamorphosis, the skin of the tail goes through degeneration under hormonal effect. It is observed that when the skin alone is removed from tail and transplanted onto the tail of other metamorphosing larva, it does not regress despite the existence of the hormone. But if the skin is grafted to the trunk with its underlying muscle in a developing tadpole, then it regresses.

So the hormone affects only the muscle directly that induces regression or progression of the skin depending upon the induction it receives from its underlying muscle of tail or trunk respectively. Likely tympanum is another instance of the induction process and is independent of direct hormone, action as its formation is induced by the tympanic cartilage.


Related Discussions:- Induction in metamorphosis

How are the sensory receptors classified, According to the stimuli they col...

According to the stimuli they collect how are the sensory receptors classified? The sensory receptors are divided according to the stimuli they get: mechanoreceptors are stimul

St-segment in exercise induced pvc, Q. What do you mean by  ST-Segment in ...

Q. What do you mean by  ST-Segment in Exercise Induced  PVC? Ans. Over the years it has been believed that repolarization in ventricular ectopic beats had no diagnostic si

External ear, EXTERNA L EAR - It is an oval shaped, some what funne...

EXTERNA L EAR - It is an oval shaped, some what funnel like, skin covered flap of elastic cartilage and muscles. It's outer stiff ridge is called hellix. Lower flexibl

Define the flavonoids, Define the Flavonoids? Flavonoids constitute the...

Define the Flavonoids? Flavonoids constitute the largest group of plan1 polyphenols, generally arc the compounds of low molecular weight, bound to sugar molecules. You may be f

What are the steps in bacterial infection, It contain four steps. They are:...

It contain four steps. They are: Attachment to host Proliferation Invasion of host tissue Toxin-induced damage to host cell

Which term describes study of animal behaviour, Which of the below terms de...

Which of the below terms describes study of animal behavior based on comparisons, observation of patterns, and consideration of environmental adaptations? Is it: a) Ethology (p

Opiate narcotics - psychological drug dependence, OPI A T E NARCOTICS - ...

OPI A T E NARCOTICS - They suppress brain activity and relieve pain popularly known as pain killers. They are sedative and astringent in nature. An astringent cause

Define inhibitors and enhancers - absorption of dietary iron, Define Inhibi...

Define Inhibitors and Enhancers - absorption of dietary iron? Phytates and fibre from whole grain cereals, tannins and polyphenols in tea, oxalates in green leafy vegetables li

Synthesis of polyamine, Synthesis of Polyamine As the name of this cla...

Synthesis of Polyamine As the name of this class of compounds suggests, polyamines have several amino groups replacing hydrogen usually in alkyl chain e.g., putrescine is 1, 4

Cell theory, why is cosmozoic theory considered to be true?

why is cosmozoic theory considered to be true?

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