Question

Explain how living organisms changed the environment during earth's early years

Answer 1

Living organisms, such as cyanobacteria, played a vital role in changing the environment during Earth's early years. They contributed to the oxygenation of the atmosphere and the development of more complex life forms. This had significant impacts, including the formation of the ozone layer.

Step-by-step explanation:

During Earth's early years, living organisms had a significant impact on the environment. The first life forms were single-celled organisms that evolved into more complex organisms over time. One crucial change that occurred was the oxygenation of the atmosphere, which allowed for the development of other life forms. Cyanobacteria, also known as blue-green algae, played a crucial role in this process by producing oxygen through photosynthesis. The increase in atmospheric oxygen also led to the formation of the ozone layer, protecting against harmful ultraviolet radiation.

Answer 2

Based on many assumptions, the conditions on nearly earth, some three to four billion years ago, are thought to be much different before from what they are today. The theory called big bang is defined proposing that the earth was once part of a larger particles that coalesced after the universe initial explotion.