Which of the following supplies energy for quick bursts of intense activity lasting up to 10 seconds?


a. Phosphocreatine
b. Aerobic glucose breakdown
c. Lactic acid
d. Caffeine


a. Phosphocreatine

Biology & Microbiology

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ATP hydrolysis directly powers the movement of _____

A) K+ out of cells B) Na+ out of cells C) Na+ into cells D) Ca++ into cells E) Cl- into cells

Biology & Microbiology

If a scientist wanted to determine if a forest environment had been polluted, which of the following groups of organisms typically would be the best indicator for the presence of pollutants?

A. amphibians B. insects C. mammals D. birds E. fish

Biology & Microbiology

Which blood cell type is correctly matched to its function?  

A.  monocytes—defense against microorganisms B.  erythrocytes—immunity C.  leukocytes—blood clotting D.  platelets—hematopoiesis E.  leukocytes—oxygen transport

Biology & Microbiology

Herbicide resistance and Bt genes from GMO

crops are now commonly found in weeds. This is an example of

a. genetic drift. b. the bottleneck effect. c. gene flow. d. the Red Queen effect. e. disruptive selection.

Biology & Microbiology