Final answer:
The prefix denoting something false is 'pseudo-', and the ectoderm is responsible for the development of skin cells. Parazoans do not have specialized tissues, unlike eumetazoans.
Step-by-step explanation:
The prefix indicating something false is pseudo-. Therefore, the answer to the student's question is 'c. pseudo'. When it comes to the subjects of biology and embryonic development, the ectoderm is the correct answer to the question 'Which of the following gives rise to the skin cells?' Similarly, for the question regarding parazoans and eumetazoans, the statement that 'Eumetazoans have specialized tissues and parazoans don't.' is a true statement, thus it would not be the false statement the question is asking for.