Which of the protective measures shall be implemented to prevent safety accidents that may occur during the experiment or practice of those involved in research activities? All research workers should wear shoes covering the end of their toes during the experiment. Clean lab cot should be worn at all times during experiment. Appropriate personal protective equipment should be put on in the laboratory. Keep long hair back while conducting a experiment

The protective measures that should be implemented to prevent safety accidents during research activities include:

1. Wearing appropriate footwear: All research workers should wear shoes that cover the end of their toes during the experiment. This is to protect the feet from any falling objects or spills of harmful substances.

2. Wearing a clean lab coat: A clean lab coat should be worn at all times during the experiment. This is to protect the body from any harmful substances that may be used during the experiment.

3. Using personal protective equipment: Appropriate personal protective equipment (PPE) should be put on in the laboratory. This could include gloves, safety glasses, and face shields. The type of PPE used will depend on the nature of the experiment being conducted.

4. Keeping long hair back: Long hair should be kept back while conducting an experiment. This is to prevent the hair from coming into contact with any harmful substances or getting caught in any equipment.

These measures are all important for ensuring the safety of those involved in research activities.