The production of uric acid is advantageous to birds because uric acid __________.
a. is very soluble in water and takes very little energy to produce
b. has low toxicity, requires little water to excrete, and can be safely stored as an embryo develops in an egg
c. contributes to the production of the egg shell and can thus serve two purposes
d. takes less energy to produce than urea
e. has low toxicity, requires little water to excrete, can be safely stored as an embryo develops in an egg, and takes less energy to produce than urea
Answer: b. has low toxicity, requires little water to excrete, and can be safely stored as an embryo develops in an egg
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A. transcriptional start site and TATA box B. transcriptional start site and enhancer C. transcriptional start site and response elements D. enhancer and TATA box E. response elements and TATA box