The correct answer for the question that is being presented above is this one: "oxygen became available from cyanobacteria." About 1.2 billion years ago, eukaryotic and multicelled organisms evolved because oxygen became available from cyanobacteria.
Answer: B
Explanation:
Fracking sites release a toxic stew of air pollution that includes chemicals that can cause severe headaches, asthma symptoms, childhood leukemia, cardiac problems, and birth defects.
From the box plot shown we see that:
The median of Liam's data is 10, the range is (20-4)=16
The median of Sumat's data is 14, the range is (22-3)=19
The correct answer will therefore be:
C. The range of Liam's data set is 16
The sum of factors that add up to a community’s quality of life. This can include the built and natural environments, economic prosperity, social stability, educational opportunity, and entertainment and recreation possibilities.
