Which statement is true?
a. Atmospheric nitrogen is abundant and easily fixed by plants and phytoplankton.
b. Climate models used by scientists only incorporate human contributions to the atmosphere.
c. Fossil fuels are regenerated too slowly to be considered a renewable resource.
d. Carbon and other elements are permanently sequestered within sediment on the ocean floor.
c. Fossil fuels are regenerated too slowly to be considered a renewable resource.
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Amylase has specific active sites for which type of molecule?
a. carbohydrates b. proteins c. lipids d. amino acids
Testing a cancer chemotherapy drug for safety before it is approved for marketing is an example of what general type of science?
a. basic b. expedited c. applied d. conclusive
Karyotyping involves taking pictures of
chromosomes during a. prophase. b. telophase. c. metaphase. d. interphase. e. anaphase.
Name the three usual phases of bacterial growth in a liquid medium
What will be an ideal response?