The abundant remains of ammonites in Oklahoma indicate that Oklahoma was
A. always a semi-arid grassland.
B. once a vast desert with almost no rainfall.
C. once a part of a mountain range that has now eroded.
D. once covered by a shallow ocean.
E. part of a vast tropical forest.
D. once covered by a shallow ocean.
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The term used to describe a virus that causes a global outbreak of serious illness of which little natural immunity exists and that has sustained person-to-person transmission is:
a. epidemic. b. pandemic. c. endemic. d. widespread.
Which of the following organisms is NOT a
cephalopod?
a. slug b. octopus c. squid d. nautilus e. more than one of these is NOT a cephalopod
Movement is provided by contractions of ______ tissue.
A. epithelial B. connective C. muscle D. nervous E. All of the answer choices are correct.
You shake up a bottle of vinegar and oil dressing to mix it each time you use it. The reason you need to do this is that:
A) fat molecules are too large to dissolve in water. B) vinegar has an acidic pH and is neutralized when mixed with oil. C) oil is hydrophobic and won't dissolve in vinegar, so the oil and vinegar separate upon standing. D) vinegar and oil are oppositely charged, and opposites attract.