According to the passage, which of the following is true about vasotocin?
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[[snippet]]We know that vasotocin and vasopressin fulfill the same function, and we also know that vasotocin in present in vertebrates that are not mammals and vasopressin is present in mammals.
Incorrect.
[[snippet]]The passage states that some scientists think that vasopressin and oxytocin evolved from vasotocin, but we do not know for sure if this is true.
Incorrect.
[[snippet]]Vasotocin is found in vertebrates which are not mammals.
Incorrect.
[[snippet]]Some scientists hypothesize that a mutation of the gene for vasotocin created oxytocin and vasopressin in mammals, but we do not have any information whether this is a likely theory.
Incorrect.
[[snippet]]According to the passage, studying vasopressin's, not vasotocin's, structure sheds light on the evolutionary history of oxytocin.