(Question)
Q: What is the most important source of electromagnetic waves on earth? Choices: - cell phones - wireless networks - radios - the sun A:
(Answer)
the sun

(Question)
Q: What class of invertebrate animals has additional appendages called the chelicerae and the pedipalps? Choices: - fish - arthropod - mammals - arachnid A:
(Answer)
arachnid

(Question)
Q: What is the greek word meaning "to help make things easier"? Choices: - toy - battery - mode - machine A:
(Answer)
machine