Question

1. the first signs of life started out as what?

○ amino acids and proteins
○ single - celled organisms
○ multicelled organisms

Explanation:

The first signs of life in Earth's history are traced to single-celled organisms (e.g., prokaryotes like bacteria), which appeared ~3.5 billion years ago. Amino acids/proteins are organic molecules (precursors, not life), and multicelled organisms evolved later.

Answer:

single-celled organisms