Members of the most ancient group of organisms, the prokaryotes, still exist today.
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Q4: Salmon spawn in seawater and Atlantic eels
Q5: Oxygen concentrations are lowest in the deepest
Q6: Most fish species are easily able to
Q7: Taxonomy is the scientific classification of the
Q8: Respiration uses carbon dioxide and produces oxygen
Q10: Both light energy and inorganic nutrient concentrations
Q11: Autotrophs do not respire.
Q12: Photosynthesis is used by all autotrophs to
Q13: Sunlight usually penetrates to a greater depth
Q14: Bioluminescence is commonly used to avoid being
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