Which of the following was produced in experiments on primitive Earth conditions conducted by Miller-Urey and others? 

A. ammonia and water
B. amino acids
C. CO2 and H2O
D. ammonia and hydrogen sulfide
E. methane and oxygen


B. amino acids

Biology & Microbiology

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The nitrogenous waste that requires the most energy to produce is _____

A) ammonia B) ammonium C) urea D) uric acid

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Stimulating the vagus nerve would cause  

A.  a release of epinephrine. B.  blood volume to increase. C.  increased firing of the SA and AV nodes D.  blood pressure to rise. E.  heart rate to decrease.  

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What are three important differences between mitosis and meiosis I?

What will be an ideal response?

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To stabilize the environment in the Biosphere II habitat and enable it to become self-sufficient again, it would be helpful to

What will be an ideal response?

Biology & Microbiology