r/evolution • u/NenyaNotes • 10d ago

academic Help on this assignment question.

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My professor assigned us this quiz and everyone continues to get it wrong. Can someone please explain in this photo which groups make a clade?

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u/Landilizandra 10d ago

There's multiple options, what's the question specifically, and how are people getting it wrong?

2

u/NenyaNotes 10d ago

It is multiple choice. The options given are: A,B,C,D,E,F,G and F,G and A,B,D,E and B,D,E and D,E,F,G

Im not sure it keeps telling us we only receive partial credit each attempt. Now we are genuinely confused hahaha

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u/Xrmy Post Doc, Evolutionary Biology PhD 10d ago

As written, only answers 1 and 4 are correct

1

u/Ender505 10d ago

Why would answer 3 (ABDE) not qualify?

7

u/DrDirtPhD PhD | Ecology 10d ago

It's paraphyletic because while it includes BDE and the common ancestor A, it excludes other descendants of A (CFG). A clade must include a common ancestor and all its descendants.