Scientists Using RNA in Situ Hybridization Techniques Observed That a Transcription

Multiple Choice

Scientists using RNA in situ hybridization techniques observed that a transcription factor called macho-1 localized to some cells during early cleavage,but not others.Descendents of these cells expressing macho-1 produce mesodermal tissues.If you prevented the expression of macho-1 in an embryo during cleavage,which structures might you expect to be absent in later development?

A) neural tube
B) somites
C) digestive system
D) skin