Which option orders the events chronologically, from earliest to latest.(1 point)

Question

Responses

Photosynthesizing bacteria release oxygen into the sea. Oxygen concentrations increase in the atmosphere. Many new animal species evolve. Single-celled organisms increase atmospheric methane concentrations.
Photosynthesizing bacteria release oxygen into the sea. Oxygen concentrations increase in the atmosphere. Many new animal species evolve. Single-celled organisms increase atmospheric methane concentrations.

Many new animal species evolve. Single-celled organisms increase atmospheric methane concentrations. Photosynthesizing bacteria release oxygen into the sea. Oxygen concentrations increase in the atmosphere.
Many new animal species evolve. Single-celled organisms increase atmospheric methane concentrations. Photosynthesizing bacteria release oxygen into the sea. Oxygen concentrations increase in the atmosphere.

Single-celled organisms increase atmospheric methane concentrations. Oxygen concentrations increase in the atmosphere. Photosynthesizing bacteria release oxygen into the sea. Many new animal species evolve.
Single-celled organisms increase atmospheric methane concentrations. Oxygen concentrations increase in the atmosphere. Photosynthesizing bacteria release oxygen into the sea. Many new animal species evolve.

Single-celled organisms increase atmospheric methane concentrations. Photosynthesizing bacteria release oxygen into the sea. Oxygen concentrations increase in the atmosphere. Many new animal species evolve.
Single-celled organisms increase atmospheric methane concentrations. Photosynthesizing bacteria release oxygen into the sea. Oxygen concentrations increase in the atmosphere. Many new animal species evolve.

Answer 1

To order the events chronologically from earliest to latest, we should consider the sequence of biological and atmospheric changes in Earth's history.

1. Photosynthesizing bacteria release oxygen into the sea: This is one of the earliest events because it marks the beginning of photosynthesis and oxygen production.
2. Oxygen concentrations increase in the atmosphere: As photosynthetic bacteria continue to produce oxygen, it begins to accumulate in the atmosphere.
3. Many new animal species evolve: The increase in atmospheric oxygen allows for more complex life forms, leading to the evolution of various animal species.
4. Single-celled organisms increase atmospheric methane concentrations: Methanogens (a type of single-celled organism) can produce methane as a byproduct, and their populations may expand in an environment conducive to their growth.

Considering this sequence, the correct order is:

Photosynthesizing bacteria release oxygen into the sea. Oxygen concentrations increase in the atmosphere. Many new animal species evolve. Single-celled organisms increase atmospheric methane concentrations.