Scientists have inferred that there have been at least five
mass extinctions in Earth's history.
How would fossil evidence support
this inference?

Compare the composition of the moon's surface with the composition of the earth's surface.

Use the above pedigree for questions 1,2, and 3 1. what kind of genetic disorder is represented in the pedigree? a. recessive b. dominate refer to the pedigree in question 1. 2. is the mutated gene in this disorder located on a sex chromosome (x or y) or an autosome? a. sex chromosome b. autosome refer to the pedigree in question 1. 3. which generation has individuals that you are certain are heterozygous for the mutated gene? a. generation 1 b. generation 2 c. generation 3

What is the one part of the nucleotide  that differs among the other different nucle  tides?