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Vertebrate Adaptions For Terrestrial Life - Essays

Vertebrate Adaptions For Terrestrial Life

AP-Biology Essay on vertebrate structural adaptations for terrestrial life.
(From an actual past AP-BIOLOGY test)
The problems of survival of animals on land are very different from
those of survival of animals in aquatic environment. Describe four problems
associated with animal survival in terrestrial environments but not in aquatic
environments. For each problem, explain a physiological of structural solution.

Four problems faced by animals on land are breathing (respiration),
water conservation in excretions, successful reproduction, and the producing an
egg which can survive outside of the water.

All animals need to respire, but I have no idea why. Maybe you would
like to answer ...

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mouth, passes through the trachea,
then branches off at the two bronchi, and goes through many branching passages
called bronchioles, which end in alveoli. Alveoli are sack-like structures where
the circulatory system meets the respiratory system.

Since terrestrial vertebrates do not live in water, they need to develop
a means of conserving water. One way we do this is through our excretions.
Nitrogen forms a major waste product in animals. When amino acids and nucleic
acids are broken down, they release toxic ammonia (NH3). To rid the body of this
toxin, several mechanisms have evolved, each appropriate to the habitat or
survival of the animal. Aquatic animals secrete NH3 directly into the
surrounding water. Land animals cannot do this because of the toxicity of NH3.
Instead, NH3 is converted into urea in our livers. Urea is significantly less
toxic than NH3, and thus requires less water to excrete in the urine. The reason
we need the water to excrete this is because the water ...

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Vertebrate Adaptions For Terrestrial Life. (2006, September 20). Retrieved January 7, 2026, from http://www.essayworld.com/essays/Vertebrate-Adaptions-For-Terrestrial-Life/52668

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PAPER DETAILS

Added: 9/20/2006 04:45:34 AM
Category: Science & Nature
Type: Premium Paper
Words: 624
Pages: 3

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