Unlike energy, matter cycles. This means that
A) chemical elements are continually cycled within ecosystems.
B) chemicals can store energy for later use.
C) once a chemical element is put in the system it does not change forms or react with
other elements.
D) All of these.
E) A and B
Ans: E) A and B
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Carbon dioxide is the only greenhouse gas
Indicate whether the statement is true or false
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
Which of the following is an example of a hydrocarbon?
a. C2H6O b. C8H18 c. C6H12O6 d. CO2 e. C2H6S
What organ aids in the camouflage of a fish by making the ventral surface light?
a. Chromatophores b. Epiphores c. Photophores d. Mesophores