Which events contributed to life evolving on Earth

Subject : Biology

Question:

Which events contributed to life evolving on Earth? Check all that apply.

A)Organisms began to photosynthesize.

B) The surface cooled, and water condensed.

C) Volcanoes added carbon dioxide to the atmosphere.

D) Ozone formed and blocked ultraviolet rays from the Sun.

E) Comets crashed into Earth, releasing water.

Expert Verified Solution:

Several key events contributed to the evolution of life on Earth:

1. Organisms began to photosynthesize: Photosynthesis by early microorganisms produced oxygen as a byproduct, significantly altering the atmosphere and enabling the evolution of more complex life forms.

2. The surface cooled, and water condensed: As the Earth’s surface cooled, water vapor condensed to form oceans, providing a stable environment for the development of life.

3. Volcanoes added carbon dioxide to the atmosphere: Volcanic activity released carbon dioxide and other gases, which played a crucial role in shaping the early atmosphere and climate, influencing the development of life.

4. Ozone formed and blocked ultraviolet rays from the Sun: The formation of the ozone layer was vital in shielding the Earth’s surface from harmful ultraviolet radiation, allowing life to thrive and evolve.

5. Comets crashed into Earth, releasing water: The impact of comets contributed to the formation of Earth’s oceans and provided essential water resources for the development of life.