At one time, sponges were lumped into one phylum. Then, they were separated into several different phyla. Now, they are considered one phylum again. These changes indicate which of the following?
A) Every phylogeny should be considered a hypothesis that must be revised in the light of new data.
B) We need more fossil evidence of sponges.
C) Molecular and morphological data often conflict when we try to reconstruct evolutionary history.
D) The goal of making all taxonomic groups monophyletic is unrealistic.

Question

Quizplus · Accepted Answer

The changes in the classification of sponges over time reflect the nature of phylogenetic studies as hypotheses that evolve with new data, highlighting the dynamic nature of taxonomy and the importance of revising classifications in light of new evidence.

At One Time, Sponges Were Lumped into One Phylum