How can plastic grocery bags damage the environment?
Ans: b/c they don't decompose or break down naturally, they aren't biodegradable, so they can build up into major sources of waste and litter
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The pH scale is the logarithmic measure of hydrogen ion concentrations
Indicate whether the statement is true or false
Which of the following is most similar in volume to an acre-foot of water?
A) 1,000 Gallons B) An acre covered to a depth of 3 feet (1 meter) C) Most of a football field covered to a depth of 1 foot D) A square mile of land covered to a depth of 3 feet (1 meter) E) 20 Million gallons
Which of the following was not the location of an early civilization?
A. the Huang He (Yellow River) of China B. coastal Peru C. Mesopotamia D. Northeastern United States
Cytokines bind to which of the following?
A) B cells B) macrophages C) T cells D) all of these