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Vertebrate Adaptions For Terrestrial Life
Beginning of essay
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 terre ....
Middle of essay
....n, 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 .... |
| Number of words: 624 |
Approximate pages: 3 |
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