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Reading Comprehension: Detail Questions

According to the passage, which of the following is true about vasotocin?

Excellent job!

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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.

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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.

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Vasotocin is found in vertebrates which are not mammals.

Incorrect.

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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.

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According to the passage, studying vasopressin's, not vasotocin's, structure sheds light on the evolutionary history of oxytocin.

Vasotocin fulfills the same function in other vertebrates as vasopressin does in mammals.
Vasopressin and oxytocin evolved from vasotocin.
Vasotocin is found only in mammals.
It is likely that a mutation of the gene for vasotocin created oxytocin and vasopressin in mammals.
Studying vasotocin's structure sheds light on the evolutionary history of oxytocin.