Multiple choice

You will hear a recording about origin of life. At the end of the recording, the last word or group of words has been replaced by a beep. Select the correct option to complete the recording.

  1. chemicals

  2. cells

  3. structures

  4. reactions

  5. elements

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The direction says that the recording is about origin of life, which stated off as assembly of simple cells and progressed through self-replicating molecules.