Answer Happy

Chapter 19 practices.
1. The study of early life on planet Earth involves the sciencesof ____ and _____. Following the _____ that formed the universe,asteroids began to orbit our sun approximately _____ yearsago. Earth appeared roughly _____ years ago. This early Earthlikely had little to no oxygen, based on the absence of ____ inEarth's most ancient rocks.
2. ____ may have delivered the building blocks of life fromspace to Earth. Miller and Urey's experiment replicated theformation of these under conditions similar to those on earlyEarth.
3. Location where concentration of organic monomers may haveoccurred, allowing for polymerization. Hypothesis proposing thatlife began at deep-sea thermal vents. Ancestors of cells.
The study of early life on planet Earth involves the sciences of appeared roughly and that formed the universe, asteroids began to orbit our sun approximately years ago. This early Earth likely had little to no in Earth's most ancient rocks. Fill in the left column of the table below with the term that matches the description in the right column. Term Description May have delivered the building blocks of life from space to Earth Fill in the left column of the table below with the word(s) matching the definition in the right column. RNA world hypothes Miller and Urey's experiment replicated the formation of these under conditions similar to those on early Earth Synthesis of life's building blocks may have occurred at these underwater geysers Hypothesis proposing that life began at deep-sea thermal vents Location where concentration of organic monomers may have occurred, allowing for polymerization ancestors of cells Hypothesis proposing that RNA was the first genetic material Following the The earliest proposed fossil cells come from Canadian rocks that are about filaments that are similar to those formed by cells near modern comes from fossil they are metabolically similar to modern years ago. Earth , based on the absence of . Other rocks include fossils that show the presence of years old. They contain tubes and . The most widespread evidence of early life which suggests that