Ozone in the outer layer of the atmosphere has important consequences for living things in that it:
A) is a pollutant.
B) is involved directly in respiration.
C) aids in the aggregation of molecules.
D) absorbs ultraviolet rays from sunlight.
E) is used by autotrophs to make sugars.
Correct Answer:
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Q2: The first cells on Earth were most
Q3: Which of the following statements concerning primitive
Q4: The function of the cuticle is:
A)absorbing water.
B)retarding
Q5: Which of the following statements about proteinoid
Q6: A heterotroph:
A)is a "self-feeder."
B)uses energy from the
Q8: Prokaryotic cells differ from eukaryotic cells in
Q9: Life existed on Earth as early as
Q10: The function of stomata is:
A)providing support.
B)anchoring the
Q11: Which of the following statements concerning the
Q12: The oxygen gas released in photosynthesis originates
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