Summarize what you have learned in Lesson 3.1 by answering the focus question: "What is the pattern of Earth's average temperature?" Use the Ta Explorer from the periods 1880-2011 and 1979-2011 for examples in your answer.

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes