In addition to its flavor, a flavorant's chemical structure also determines its odor threshold. The odor...

In addition to its flavor, a flavorant's chemical structure also determines its odor threshold. The odor threshold of a flavorant is the smallest concentration of the flavorant that the human nose can detect, or perceive. So, in order for a person to detect a flavorant, it must be present at a concentration that is equal to or above its odor threshold.
Which of the following statements are true? Select all that apply.
A flavorant's chemical structure determines both its flavor and its odor threshold.
A flavorant can only be detected when its concentration is lower than its odor threshold.
How are substances represented by chemical formulas and models?