Your hypothesis is at the biggenning or the end of you summary
Answer:
1. DNA copying mistakes made during cell division, exposure to ionizing radiation, exposure to chemicals called mutagens, or infection by viruses.
2. both
Explanation: Since errors can occur when DNA replicates itself, mutations can occur in both asexually and sexually reproducing organisms.
Answer:
bond angles of 120 degrees.
I think it is 4. Covalent compound which is named carbon dioxide.
