Which of the following has been an effect of ecotourism in Hawaii?
A) The trash from millions of visitors has choked out mangrove forests on the island of Oahu.
B) Tourists have irreparably damaged sensitive coral reef ecosystems.
C) Conservation efforts have become more financially feasible because of increased tourist dollars.
D) A large marine reserve in Hawaii was forced to close because of the increased need to feed tourists.
E) Ecotourism has always been banned in Hawaii, but other Pacific islands have experienced myriad negative effects of ecotourism.
Answer: C
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Neurotransmitters
A. are used in electrical synapses only. B. bind to receptors in the target neuron with a "lock and key" fit. C. are used in both electric and chemical synapses. D. are moved to target neurons via active transport.
Which of the following is most true regarding the Big Bang Theory?
A. It resulted from the ignition of an enormous concentration of hydrogen gas. B. The theory has been disproved in recent years. C. The universe began expanding from a single point about 14 billion years ago. D. The theory applies only to the Milky Way Galaxy. E. All of the matter in the universe was created in an instant.
Instructions: Choose one answer from each pair or group of selections. You might expect to find record TEMPERATURES | PRECIPITATION in a mountainous region in the tropics
Metamorphic rocks:
a. form when molted rock comes in contact with the atmosphere. b. often form depositional layers called bedding planes. c. are usually softer and less resistant to weathering than other rocks. d. can be metamorphosed. e. include the rocks obsidian and conglomerate.