Water relations in terrestrial environment, Biology

Assignment Help:

Water Relations in Terrestrial Environment

Insects are the largest group of metazoans which have most successfully invaded the terrestrial environment. In addition, most arachnids, myriapods and isopod crustaceans do not depend upon the aquatic environment for their survival. Terrestrial anthropoids owe their success to life on land to the existence of an impermeable cuticle that prevents evaporation of water from the body. Their cuticle, a chitin-protein complex along with a hydrophobic wax layer on the surface is the water-proofing structure. The cuticle is an important structure which had made possible to a large extent the successful colonisation of land. Water loss through the spiracular openings is minimized by keeping the spiracles closed whenever the inspiration does not occur. The proximal region of Malpighian tubules and more importantly, the rectum play an important role in water resorption expelling only dry faecal pellets with insoluble uric acid as nitrogenous waste. Pulmonate molluscs that have taken to terrestrial habitat have a calcareous shell that avoids desiccation of the soft inner parts of the body. Physiological adaptations such as aestivation assist them to overcome adverse climatic conditions.


Related Discussions:- Water relations in terrestrial environment

Determine major aspects of the mechanism of freeze drying, Determine Major ...

Determine Major Aspects of the Mechanism of Freeze Drying? The major aspects of the mechanism of freeze drying are:  (a) The removal of vapour from the subliming ice front w

What is indications operation single ventricle physiology, What is Indicati...

What is Indications for Operation Single Ventricle Physiology ? The operation is indicated in patients with single ventricle physiology. Fontan operation is also indicated in p

Nutrition, definition of dietary factors. or what are dietary factors?

definition of dietary factors. or what are dietary factors?

Tissue culture, Tissue Culture It is an important technique for maintai...

Tissue Culture It is an important technique for maintaining a'pm or piece of animal or plant tissue alive after their culture dishes. It is necessary to provide an environment

Taxonmy, classification on taxonomy

classification on taxonomy

Egg envelopes, Egg Envelopes Like any other cell, all the eggs are co...

Egg Envelopes Like any other cell, all the eggs are covered by the cell membrane or plasmalemma It is with two layers of about 50 A? (unit membrane) separated by a gap of 60

Fungai, introduction in fungai

introduction in fungai

Functional properties of cardiac muscle, Normal 0 false false...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Are there chloroplasts in cyanobacteria, Are there chloroplasts in cyanobac...

Are there chloroplasts in cyanobacteria? In cyanobacteria there are no chloroplasts and the chlorophyll layers are dispersed in cytosol. Which chemical element is central in

Identical karyotypes and identical genomes, Q. Can two normal individuals o...

Q. Can two normal individuals of the same species with sexual reproduction have identical karyotypes and identical genomes? And how is the human karyotype usually represented?

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