Resident biota are found in/on the ________.
A. mouth
B. large intestine
C. nasal passages
D. skin
E. All of the choices are correct.
Answer: E
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A competitive inhibitor will affect the ________ of an enzymatic reaction.
A) Km B) Vmax C) S D) P E) both choices A and B
As you and a friend are entering a chemistry laboratory at your university, you see a sign that states: DANGER—RADIOACTIVE ISOTOPES IN USE. Your friend is an accounting major and has not had any science courses yet. She asks you what a radioactive isotope is and you respond correctly with:
A. Radioactive isotopes are atoms that are unstable and as a result emit energy in a process called radioactive decay. B. Radioactive isotopes are atoms that are stable and as a result emit energy in a process called radioactive decay. C. Radioactive isotopes are atoms that are stable and as a result only emit energy if they are exposed to higher temperatures. D. Radioactive isotopes are atoms that are unstable but unless actively disturbed by some chemical process will remain intact and pose no problems.
Some studies suggest that, as global warming progresses, tropical lowland trees may be limited in their ability to move
northward because of ____.
a. predicted desertification of temperate areas b. temperatures in the north still being too low c. flooding of coastal areas d. extreme weather events like hurricanes and blizzards e. development and habitat loss
The rotation of Earth on its axis is the driving force behind the water cycle
Indicate whether the statement is true or false