Question

1. what affects did oxygen have on the developing atmosphere? select all that apply.

Explanation:

Oxygen's presence in the atmosphere led to the oxidation of iron - rich compounds, causing an increase in rust (iron oxides). It also contributed to the development of more complex life forms through aerobic respiration, which is related to the increase in multicellular life. Oxygen can react with other substances in the atmosphere and on the Earth's surface, affecting chemical and biological processes.

Answer:

(Assuming options are: increase in rust, decrease in anaerobic life, increase in aerobic life, increase in multicellular life, decrease in multicellular life, development of weathering processes)
Increase in rust: Oxygen reacts with iron to form rust.
Decrease in anaerobic life: Anaerobic organisms are sensitive to oxygen, and its increase led to a decrease in their habitats.
Increase in aerobic life: Oxygen is essential for aerobic respiration, enabling the evolution of more complex aerobic organisms.
Increase in multicellular life: Aerobic respiration, made possible by oxygen, provides more energy, facilitating the evolution of multicellular life.
Development of weathering processes: Oxygen is involved in oxidative weathering of rocks and minerals.