Question

Select all the correct answers.

Which two statements are true about the effects of life on Earth's early oceans?
Early life increased the temperature of Earth's oceans.
Early life reduced the amount of dissolved carbon dioxide in the hydrosphere.
Early life increased the concentration of salt in Earth's oceans.
Early life helped make the oceans livable for oxygen-dependent species.

Answer 1

1. Early life reduced the amount of dissolved carbon dioxide in the hydrosphere.

2. Early life helped make the oceans livable for oxygen-dependent species.

Answer 2

Early life reduced the amount of dissolved carbon dioxide in the hydrosphere and Early life helped make the oceans livable for oxygen-dependent species.