Oxygen acts as a final electron acceptor in respiration. Which molecule is it ultimately converted into?
a. water
b. CO2
c. ATP
d. glucose
Ans: a. water
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The Lake Erie ecosystem was affected by humans because human activities ____
a. extracted resources without replacement b. caused global warming c. used the water without replacement d. disrupted energy flow and the cycling of nutrients e. extracted energy without replacement
What is a challenge that organisms living in an estuary face that other aquatic organism normally do not face?
A. changes in temperature at different depths B. daily changes in salinity C. movement of water D. light penetrating only through the photic zone E. damage from pollution
When you eat an apple, the core left over is the ovary.
a. true b. false
_________ occurs when two or more species live intimately together with their fates linked
Fill in the blank(s) with the appropriate word(s).