Why use needle loop to prepare fungi slide

To ensure uniformity during streaking of the gel surface and to also prevent contamination while picking up the spores.

Explanation:

When preparing a fungi slide, several materials are used to prepare a slide that serves the purpose. Good aseptic procedures should be followed so as to prevent contamination of the culture. Inoculating needles are used in the preparation of the slide, and they are helpful in achieving good aseptic techniques. These needles consist of the loop and needle ends.

The loop end is used in streaking the spores uniformly on the gel surface while the needle end is used in extracting the fungal colonies. Before the loop end is used, it undergoes flaming and cooling to ensure that microorganisms are killed. In so doing, contamination is also prevented.

answer: no, they are not.*

although rubber bands that contain excessive amounts of dye, toxins, or additives are sometimes toxic, most rubber bands do not cause any health issues. since they are typically made of latex, (a natural substance that is extracted from trees) they are not dangerous in any way if you chew them or accidentally ingest a piece of rubber band. however, chewing rubber bands does pose a choking hazard and is not a good habit to have.

*depending on the type of rubber band. the typical rubber bands that you see at stores are not toxic, but other types of rubber or latex that contains certain chemicals may be unhealthy and hazardous.