Question

red blood cells are able to transport oxygen because of their __ and because they contain __, which is a protein that binds to oxygen molecules.
concave shape; hemoglobin
concave shape; myoglobin
hematin
spherical shape; myoglobin
hemerythrin
hemocyanin
biconcave shape; myoglobin
spherical shape; hemoglobin
biconcave shape; hemoglobin

Explanation:

Brief[SSE Completed, Client Connection Error][SSE Completed, Client Connection Error][LLM SSE On Failure]

Answer:

Brief[SSE Completed, Client Connection Error][SSE Completed, Client Connection Error][LLM SSE On Failure]