Final answer:
In the event of dropping and shattering a glass culture tube, you should clean up the broken glass using gloves and a dustpan, and a broom, then dispose of it as directed by your teacher.
Step-by-step explanation:
If you accidentally drop a glass culture tube and it shatters on the floor, the best course of action would be to clean up the broken glass and dispose of it properly. This means that option 1 is the correct answer. You should not leave the broken glass on the floor, ignore it, or call for help unless you are unable to clean it up safely on your own.
It is important to ensure your safety and that of others in the laboratory by wearing gloves and using a dustpan and broom to pick up the broken pieces. Moreover, always consult with your teacher regarding the proper disposal of waste to avoid any safety hazards in the laboratory.