Which of the following are inorganic toxic substances sometimes found in local water supplies?
A. Salts and lead
B. Algal blooms
C. Red tides
D. Fecal coliform bacteria
E. All of these are correct
Answer: A
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Which of the following occurs in the proximal tubule?
A. Urine is collected. B. Blood pressure pushes fluid out of the capillaries. C. Glucose is transported from the blood into the filtrate. D. Certain amino acids are transported from the filtrate to the blood.
Sub-Saharan Africa and South Asia have some of the world's literacy rates averaging ________ percent
A) below 40 B) below 50 C) below 60 D) below 70 E) below 20
You are an archaeologist researching artifacts left behind by Francisco Pizzaro's conquest of Peru in the 1530s. In order to confirm the authenticity of the leather artifacts, you are performing radiometric dating using an isotope pair that has a half-life of 250 years. You expect to measure about 12.5% of the original radioactive isotope.
Indicate whether the statement is true or false.
An unstable air parcel that rises through a stable layer does not come to a screeching halt because
A) it takes time for condensation to occur B) adiabatic cooling is slower in stable air C) the rising air has upward momentum D) the stable layer may not have any liquid water droplets