An oxygen atom has ____ surrounding a nucleus composed of ____
a. neutrons; electrons and protons
b. electrons; protons and neutrons
c. protons and electrons; neutrons
d. protons; neutrons and electrons
e. electrons and neutrons; protons
ANSWER: b
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What are the homeostatic effects of angiotensin II after hemorrhage? Choose all that apply.
A. Shuts down kidney activity B. Constricts arterioles C. Minimizes urine production via aldosterone production D. Stimulates production of erythrocytes E. Stimulates thirst F. Removes lactic acid
Identify and briefly describe the functions of the labeled glands of the human endocrine system. 
What will be an ideal response?
A scientist makes three artificial mRNA strands: (x) 5' AAAUUUAAAUUUAAAUUUAAAUUUAAA 3'(y) 5' UUUCCCUUUCCCUUUCCCUUUCCCUUU 3'(z) 5' AUAUAUAUAUAUAUAUAUAUAUAUAU 3'When he analyzes the polypeptides produced, he finds that:x produces a polypeptide that is 50% phenylalanine and 50%lysine.y produces a polypeptide that is 50% phenylalanine and 50% proline.z produces a polypeptide that is 50% isoleucine and 50% tyrosine.Based on these results only, the best conclusion to make is that
A. AAA codes for phenylalanine and AUA codes for isoleucine B. AUA codes for isoleucine C. AAA codes for phenylalanine D. AAA codes for lysine and AUA codes for isoleucine E. AAA codes for lysine
Most ecosystems contain quaternary consumers.
Answer the following statement true (T) or false (F)