What do the simplest vertebrates lack?
a. Jaws
b. Notochord
c. Central nervous system
d. Teeth
ANS: A
The simplest vertebrates lack jaws. They still have a partially enclosed central nervous system
extending from the skull. Information can be found in the section Vertebrate Evolution Traces a Long
and Diverse History.
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Hazardous wastes are characterized by being mainly ________
A) dangerously radioactive B) composed of hazardous heavy metals C) composed of non-degradable materials D) corrosive, flammable, and explosive E) wastes that are not able to undergo bioremediation
A ________ is an instrument used to measure humidity
A) hygrometer. B) aquimeter. C) hydrometer. D) humidimeter.
Which of these karst features is indicative of the most advanced and intense solution of the landscape?
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