According to the cladogram, which organisms have roundworms as a common ancestor? mollusks and flatworms sponges and chordates flatworms, sponges, and cnidarians mollusks, echinoderms, chordates, and annelids

mollusks, echinoderms, chordates, and annelids

Explanation: Cladograms are diagrams made to link different organisms to a common ancestor, with the use of Cladograms the relationship between organisms will be established and organisms will be grouped together based on their common features or characteristics.

Molluscs, Echinoderm,Chordates and annelids are of a common ancestor, they are all invertebrates with COELOM.

the  frequency of a wave represents  the number of wavelengths that pass a specific point per second. the unit for  frequency  is hertz (hz).

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