Final answer:
Early Earth conditions for the evolution of life included lack of oxygen, extreme radiation, and significant volcanic activity.
Step-by-step explanation:
The conditions of early Earth at the time that life first evolved were characterized by a lack of oxygen in the atmosphere, extreme radiation levels, and significant geologic upheaval and volcanic activity.
The absence of oxygen in the atmosphere was due to the absence of photosynthetic organisms that produce oxygen as a byproduct. It took about one billion years for cyanobacteria to appear and start producing oxygen through photosynthesis, leading to the oxygenation of the atmosphere.
The extreme radiation and volcanic activity on early Earth meant that the first organisms that appeared were adapted to harsh conditions, such as high temperatures and protected environments.