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

Define about the manganese deficiency, Define about the Manganese Deficienc...

Define about the Manganese Deficiency? Mn deficiency has been observed in many species of animals and symptoms include: impaired growth, skeletal abnormalities, depressed repro

How can the hypothesis that asserts that chloroplasts, How can the hypothes...

How can the hypothesis that asserts that chloroplasts as well as mitochondria were primitive prokaryotes that associated in mutualism with primitive anaerobic eukaryotic cells be c

Direct approach to counseling, Q. Direct Approach to counseling? The di...

Q. Direct Approach to counseling? The direct approach to counselling is also called as the problem-solving approach. The counsellor collects relevant information which aims to

Osmosis, If you have water, 10% sucrose, and 40% sucrose solution. Which so...

If you have water, 10% sucrose, and 40% sucrose solution. Which solutions were isotonic to each other?

Illustrate about sterilization protocol, Q. Illustrate about Sterilization ...

Q. Illustrate about Sterilization protocol? Sterilization protocol includes proper transportation and cleaning of instruments followed by their packing. Items can be sterilized

Adenosine triphosphate (atp), Adenosine triphosphate (ATP) is a general fo...

Adenosine triphosphate (ATP) is a general form in which the energy is stored in living systems; comprises of a nucleotide (with ribose sugar) with three phosphate groups. Energy c

What are the factors affecting taste quality, Q. What are the factors Affec...

Q. What are the factors Affecting Taste Quality? You may have experienced that the four primary tastes i.e., sweet, sour, salty and bitter are not sensed with an equal ease. Th

Explain the factors that lead to vitamin k deficiency, Explain the factors ...

Explain the factors that lead to vitamin K deficiency? The factors that lead to vitamin K deficiency include: 1) Marginal dietary intake if one undergoes trauma and extensiv

What are heterochromatin and euchromatin, Chromatin is uncondensed nuclear ...

Chromatin is uncondensed nuclear DNA, the typical DNA morphology in interphase (the phase of the cell cycle in which the cells is not separating itself). In this phase of the cell

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