Which of the following statements about olfactory receptors is false? they are bulb-like structures at the tip of the frontal lobe where the olfactory nerves begin. they are cells. they are located in a mucous membrane at the top of the nose. \ they have small, hair-like extensions.

The correct option is A.
Olfactory receptor are not bulb like structures at the tip of the frontal lobe. Olfactory receptors are cells located in the mucous membrane at the top of the nose. Small hair like structures located in these receptors is the site for odor molecules dissolve in the mucous. 

Succulents are the type of plant. like a cactus.