The adequate stimuli for olfactory receptors are chemicals, typically odorant molecules. for an olfactory receptor, which modality will induce a receptor potential of the largest amplitude?

Moderate-intensity chemical.

Explanation:

Receptors may be defined as any cell, tissue or organ that has the ability to respond against the particular stimuli like light, smell and  pressure. These receptors send information to the brain.

The olfactory receptor is involved in detecting the different type of smell. This will initiate the signaling process and generation of the action potential for the  transformation of information. The moderate- intensity chemical can easily detect the change and induce the receptor action potential of the large amplitude.

Thus, the answer is moderate-intensity chemical.

d. organisms have cells with different shapes and functions.