For questions 1 and 2 use the table in figure 12-3 to help you answer the question

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anonymous · Answer

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frostbite · Answer

If you write the questions 1 and 2 we might be able to help do the question.

However we can actually work a little on that table of yours. Ever heard about Chargaff's rule? The rule states that the for the bases G and C and for the bases A and T. The ratio of the bases are approximate 1:1 in any DNA double stand. This is also very logical for us today as we know that G and C base pair while T and A base pair in DNA. 

Using this information you can fill out the remaining percentages for Human and Chicken, the bacteria you can not complete the whole. (why is this?)