Question

in the experiment of the effect of perfume on the behavior of bees, what is/are the experimental group(s)? each saucer of perfume the bees exposed to a type of perfume all the bees the bees exposed to the odorless liquid

Explanation:

In an experiment, the experimental group is the one that receives the treatment (in this case, exposure to perfume). Bees exposed to a type of perfume are getting the treatment, while bees exposed to odorless liquid would be a control group. Saucers of perfume are not the experimental group but the source of the treatment. All bees is too broad as it includes control - group bees if present.

Answer:

The bees exposed to a type of perfume