The protostome developmental sequence arose just once in evolutionary history,resulting in two main subgroups-Lophotrochozoa and Ecdysozoa.What does this finding suggest?
A) These two subgroups have a common ancestor that was a protostome.
B) The protostomes are a monophyletic group.
C) Division of these two groups occurred after the protostome developmental sequence appeared.
D) All of the above apply.
Correct Answer:
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Q1: Figure 33.1 Q2: The presence of a lophophore in a Q4: The major evolutionary split of protostome animals Q5: To which of the following terrestrial habitats Q6: Suppose you were a researcher choosing a Q7: The common ancestor of the protostomes had Q8: Which mollusc group can be described as Q9: Drosophila and Caenorhabditis are two widely used Q10: Which of these mollusc features substitutes for Q30: Whiteflies are common pest insects found on
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