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D Question 28 2 pts The tree below shows a potential hypothesis for how early life evolved. Which of the labelled nodes is LUCA? (Note that extinct lineages are marked with an X). Х [ X b d a Х Note 5 O Noded Node a Nodec

D Question 29 2 pts 10" m 10 10 Impact energy (oules) The accompanying figure shows the history of large meteorite impacts on both the earth and the moon What is the graph's major implication for the origin of life on Earth? Terrestrial craters mlarge impact thought to have formed Moon h1 hypothetical h2 hypothetical A Archaean spherule beds h1 V Vredevant Global otan vapored Su Sudbury 3,000 M Manicougan 12 Cha Chiclub Largest impacts likely to have hit Carth Lunar craters h3 hypothetical -03 Im Imbrium Mch Or Orientale Ir Iridium CO -0.003 Ts - Tsiolkovski H Hausen Langrenus 4 0 Co Copernicus Time (billions of years before present Ty Tycho 30 10 Depth of ocean evaporated (m) 10" 10 Life must have originated on a different body in the solar system and been brought to Earth. Huge impacts make it unlikely that life arose and survived on Earth before about 3.8 billion years ago The Oparin-Haldane model of life's origins applies to the moon as well as to the Earth The moon is considerably older than the Earth O Meteorites could not have brought the organic molecules that were necessary for life appear