Answer:
Scientists believe that the Earth was formed about 4.5 billion years ago. Its early atmosphere was probably formed from the gases given out by volcanoes. ... The early atmosphere was probably mostly carbon dioxide, with little or no oxygen. There were smaller proportions of water vapour, ammonia and methane.
Answer:
Statement 1a: Needle leaves, Pine(Name)
Statement 1b: Non-needle leaves, 2(Number)
Statement 2a: smooth edge, Magnolia(Name)
Statement 2b: jagged edge, Holly(Name)