Biosphere, Biology

Assignment Help:

Biosphere

Biosphere is that part of the earth where life can exist. It is a narfqy layer around the surface of the earth. If you visualise the earth to be the size of an apple the biosphere would be as thick as its skin. The biosphere extends from the floor of the ocean some 11,000 metres below the surface of the earth to the top of the highest mountains, or about 9,000 metres above the sea level. Its most densely populated region is just above and below the sea level.

Biosphere represents a highly integrated and interacting zone comprising of atmosphere (air), hydrosphere (water) and lithosphere (land) as you can see in Figure shown below.

2231_biosphere.jpg

Life inthe biosphere is abundant between 200 metres (660 feet) below the surface of the ocean and about 6,000 metres (20,000 feet) above sea level.

Biosphere is absent at extremes of the North and South poles, the highest mountains and the deepest oceans, since existing conditions there do not support life. Occasionally spores of fungi and bacteria do occur at great height beyond 9,000 metres, but they are not metabolically active, and hence represent only dormant life.

The energy required for the life within the biosphere comes from the sun. The nutrients necessaj for living organisms come from air, water and soil and not from outside. The same chemicals are recycled over and over again for life to continue. Living organisms are not uniformly distributed throughout the biosphere. Only a few organisms live in the polar regions, while the tropical rain forests have an exceedingly rich diversity of plants and animals.

 


Related Discussions:- Biosphere

Health insurance and its interaction with medical market, Normal 0 ...

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

What are the main human degenerative diseases, What are the main human dege...

What are the main human degenerative diseases? The main human degenerative diseases are separated into three groups: cardiovascular diseases, neoplastic diseases and degenerat

#title.how can help me solve this problem?, i have a question on how to pro...

i have a question on how to proceed the fomular of delete the gene on the human body.

Protozoa, way of remember phylum protozoa

way of remember phylum protozoa

Oxidative phosphorylation occurs in the inner membrane, In  eukaryotes,  th...

In  eukaryotes,  the electron  transport  and oxidative phosphorylation occurs in the inner membrane of mitochondria.  These processes re-oxidize the FADH 2 and NADH   which comes

What is resting membrane potential of an axon, Action potentials include ch...

Action potentials include changes in the membrane potential of an axon, as shown in the schematic below. During the refractory period, sodium channels are inactivated and

Explain microtube and hedstorm file removal technique, Explain Microtube an...

Explain Microtube and Hedstorm file removal technique A Hedstorm file was then passed down the length of the tube until it engaged itself tightly between the obstruction an

Dietary recommendations proposed by whom, Q. Dietary recommendations propos...

Q. Dietary recommendations proposed by WHOM? We learnt about their etiological factors, metabolic alterations, clinical anifestations and dietary management of the disease of h

Endocine organ, #question.endocrine organ in crustaceans

#question.endocrine organ in crustaceans

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