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The land animals that evolved from earlier froms had to change their mechanisms for excreting nitrogenous wastes because?
Land animals had a more difficult difficult time with water balance than aquatic species since water was not always available on land
Natural selection is nature's mechanism for selecting characteristics that best adapt the animal to its environment. Mammals have evolved a sophisticated mechanism for eliminating nitrogenous wastes that involves?
forming urea and storing it in concentrated solution
Which of the following statements about uric is true?
Animals that excrete uric acid avoid the problem of water loss associated with excretion of urea
Which of the following is a function of the vertebrate liver?
Combining ammonia and carbon dioxide to form urea
What is the advantage of excreting nitrogenous waste in the form of ammonia?
Ammonia excretion conserves energy
Animals that effectively use their body surface for gas exchange must?
Have a high ratio of the body surface are to volume
Which of the following organisms has a respirtory system that does not require assistance from a circulatory system for gas exchange?
The organizationof the bloood and water flow in a fish's gills increases that fish's ability to?
Extract oxygen from the water
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