Answer:
B. Phosphorus exists as a single element in both living and nonliving things.
Explanation:
I would say,
Aa.
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food chain:The simplest representation of energy in a community. At the base is energy stored in plants, which are eaten by small organisms, which in turn are eaten by progressively larger organisms; the food chain is an oversimplification in that most animals do not eat only one type of organism.
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food web:the interconnected feeding relationships in an ecosystem. These relationships can be complex; some organisms may feed on more than one trophic level, or changes may occur depending on a species' life history stages or the availability of food.
club drugs: lsd cause rapid heart rate
hallucinogens: bath salts causes hallucinations and can be dangerous to self and others
The type of reaction that build proteins from amino acids are dehydration reactions
