Fish are the earliest vertebrates
a. True
b. False
True
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The humility principle advises us to be humble in the face of natural systems
Indicate whether the statement is true or false
_____ structures probably indicate descent from a common ancestor with modifications for different functions
a. Homologous
b. Analogous c. Vestigial d. Derived e. Primitive
A self-amplifying reaction and a nuclear explosion in a nuclear power plant are prevented in large part by ________
A) the regular addition of uranium-239 to the fuel B) control rods that absorb extra neutrons C) "sponges" that absorb liquefied uranium that leaks out of the reactor core D) the production of plutonium-239 E) fuel rods that absorb tremendous amounts of heat
Groins starve the adjacent, downcoast beach area of sediment input
a. True b. False Indicate whether the statement is true or false