Recent studies indicate that active prokaryotic assemblages are present in high-temperature oil reservoirs, including genera such as
A. only Thermotoga and Thermoanaerobacter.
B. Agrobacterium.
C. Thermoanaerobacter.
D. Thermotoga.
Answer: A
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Which of the following statements is true regarding respiration in birds? Choose all that
A. Bird lungs inflate due to negative pressure in the chest cavity. B. Bird lungs deflate due to negative pressure in the chest cavity. C. Oxygen enters the bloodstream via crosscurrent exchange. D. Oxygen enters the bloodstream via countercurrent exchange. E. Respiration depends on the movement of air through air sacs. F. Respiration depends on the movement of air through spiracles.
Vast __________ form in the interior of midlatitude
continents. Fill in the blank(s) with the appropriate word(s).
Which of the following is not found in DNA?
A) uracil B) cytosinne C) adenine D) thymine
examples of Analogous structures
What will be an ideal response?