instruction:
Given a scientific question, generate an incorrect answer to the given question. The incorrect answer should be a plausible alternative to the correct answer. The answer should be some other item belonging to the same category as the correct answer but should be incorrect.
question:
The earliest vertebrates were jawless what?
answer:
mammals

question:
Unlike a crystalline solid, an amorphous solid is a solid that lacks a what?
answer:
atoms

question:
What are chemical bonds between atoms of nonmetals that share valence electrons called?
answer:
electron bonds