10. Each of Earths mass extinctions caused a drop in background extinction rates
wiped out at least half of Earth's existing species
was a result of human activities
was followed by a decrease in biodiversity
O took place in the last 1 million years
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in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation:

her next move would be to use agarose gel electrophoresis to separate the dna molecules of varying length and create a dna fingerprint.