Answer:
carbon, hydrogen, nitrogen and oxygen
Explanation:
mostly, combination of carboxylic and amine groups
Zit sure has to be B. Pollution
No there is no selective pressure that confers an advantage to those who do taste it.
<h3>What is PTC?</h3>
Despite the fact that PTC isn't found in nature, tasting other bitter substances—many of which are toxins—that do occur naturally has a high correlation with taste sensitivity.
In order to defend themselves from being eaten, plants develop a range of harmful substances. Early humans developed the capacity to distinguish bitter tastes as a safeguard against ingesting dangerous plants. There are roughly 30 genes in humans that produce bitter taste receptors. People may taste a large variety of bitter substances because each receptor can interact with a number of different molecules.
Learn more about Taste with the help of the given link:
brainly.com/question/26220534
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The answer is C.<span>The shell protects the crab from predators</span>
I hope this help but the metalloids is gruop five if that what your asking if not i will answer the other question for you
