Answer:
1. B
2. B
3. B
4. A
5. D
6. D
7. A
8. Receptors in the nose and tongue helped our ancestor to choose foods which were nutritious and energy-giving while avoiding those others which were toxic.
The quote below is from the article, "A Matter of Taste".
<em>"Sweet tastes, like those of ripe fruits, suggest a food that provides needed energy. Every calorie (a measure of food energy) was important to our ancient hunting and gathering ancestors. Bitter tastes, on the other hand, could indicate poison. Many plants produce bitter toxins to keep from being eaten.
</em>
<em>Sourness might mean a fruit is unripe and indigestible or even spoiled, or it could point out a dangerous acid. Salt is something we need (in moderation) for our muscles and nerves to work properly.
"</em>
Explanation:
1. B. Humans have taste receptors that are unique to them and will likely taste different things in food.
2. B. “When the brain combines the signals from the tongue and the nose, it figures out the food’s identity from its flavor.” (Paragraph 4)
3. B. to provide an example of an experiment that engages the four main tastes
4. A. It shows that there was false information about the tongue for a long time.
5. A. built-in
6. D. Crops that are bred to have greater yields naturally have fewer sweet-enhancing volatiles.
7. A. It provides information about one scientist who is learning about taste and educating others.
8. Receptors in the nose and tongue helped our ancestor to choose foods which were nutritious and energy-giving while avoiding those others which were toxic.
The quote below is from the article, "A Matter of Taste".
<em>"Sweet tastes, like those of ripe fruits, suggest a food that provides needed energy. Every calorie (a measure of food energy) was important to our ancient hunting and gathering ancestors. Bitter tastes, on the other hand, could indicate poison. Many plants produce bitter toxins to keep from being eaten.
</em>
<em>Sourness might mean a fruit is unripe and indigestible or even spoiled, or it could point out a dangerous acid. Salt is something we need (in moderation) for our muscles and nerves to work properly.
"</em>
