The answer is B... im just making a guess so...
The answer would be: <span>neuregulin 1
</span>Schizophrenia is a psychiatric disease that involves symptoms related to brain inability to understand reality. Neuregulin 1 or NRG1 found to be linked with schizophrenia. Neuregulin 1 has a role in the neurobiological function and some of it related to the pathophysiology of the schizophrenia.
System that removes solid and liquid wastes is called excretory system.
Hope this helps~
The answer is A- sperm and egg. gametes are reproductive cells in mammals, so sperm and egg would be the correct.