Placing Sponges as the Basal Metazoans on the Basis of Lack

question 56

Multiple Choice

Placing sponges as the basal metazoans on the basis of lack of tissues implies which of the following?

• A) Sponge ancestors never had tissues.
• B) Modern-day sponges have lost the ability to form tissues.
• C) Multicellular, modern-day choanoflagellates can form tissues.
• D) Sponges do not have nerve cells.

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