Multiple Choice
Carbon dioxide (CO2) is
A) removed from the atmosphere during photosynthesis.
B) a source of carbon.
C) returned to the atmosphere during respiration and fermentation.
D) used by marine organisms to make limestone for their hard shells.
E) All of these choices are correct.
Correct Answer:
Verified
Correct Answer:
Verified
Q8: Which of the following is a nitrifying
Q9: Which of the following water-borne pathogens are
Q10: The main decomposers are the fungi and
Q11: Indicator bacteria are<br>A)coliforms.<br>B)gram-negative rods.<br>C)evidence of fecal contamination.<br>D)used
Q12: Most of the zooplankton and phyoplankton in
Q14: Describe the carbon cycle from the atmosphere
Q15: The thin envelope of life that surrounds
Q16: How does methyl mercury affect living things?<br>A)It
Q17: Which of the following cannot be photoautrophs?<br>A)bacteria<br>B)fungi<br>C)plants<br>D)algae<br>E)All
Q18: The primary role of producers is to