according to the cladogram, which organisms have roundworms as a common ancestor? mollusks and flatworms…

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

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

Answer

Answer:

D. mollusks, echinoderms, chordates, and annelids

Explanation:

Step1: Understand cladogram concept

A cladogram shows evolutionary relationships.

Step2: Locate roundworms on cladogram

Roundworms are a branching - point organism.

Step3: Identify descendants of roundworms

Organisms branching after roundworms share a common ancestor with them. Mollusks, echinoderms, chordates, and annelids branch after roundworms on the given cladogram.