What is the correct rank order for relative energetic cost (most to least) of the primary nitrogenous wastes generated by different animals?
A. ammonia ? urea ? uric acid
B. uric acid ? urea ? ammonia
C. urea ? uric acid ? ammonia
D. ammonia ? uric acid ? urea
E. urea ? ammonia ? uric acid
B. uric acid ? urea ? ammonia
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Cephalization is:
A. the development of a "head end" in an organism. B. the concentration of sensory organs at one end of an animal. C. the development of a brain. D. All of the answer options are correct.
What characteristics of Caenorhabditis elegans make it useful in molecular genetics studies? What will be an ideal response?
The digestive juices found in the stomach include
A. trypsin and maltase. B. insulin and bile. C. pepsin and hydrochloric acid. D. sodium bicarbonate and hydrochloric acid. E. pancreatic and salivary amylase.
Choose the most effective means of birth control from the following list.
A. birth control pill B. condom C. spermicidal foam D. diaphragm