Use the figure to answer the question. Which of the following statements is supported by the phylogeny in the figure?
A) Deuterostoma are more evolutionarily advanced than Porifera.
B) Traits, once they evolve, are retained in later-evolving taxonomic groups.
C) Animals show no evidence of convergent evolution in their traits.
D) Animals with extremely different adult forms can be relatively closely related.
Use the figure to answer the question. Which of the following pairs of animals show that animals with widely different adult features can be each other's closest relatives?
A) Annelida and Nematoda
B) Chordata and Echinodermata
C) Cnidemia and Ctenophora
D) Annelida and Rotifera
Why might researchers choose to use molecular data (such as ribosomal RNA sequences) rather than morphological data to study the evolutionary history of animals?
A) Molecular data can be gathered in the lab, while morphological data must be gathered in the field.
B) Molecular data can be used to give an estimate of the time since two groups split.
C) Morphological changes usually do not result from molecular changes.
D) Some phyla vary too widely in morphological characteristics to be classified accurately.
If in the future the current molecular evidence regarding animal origins is further substantiated, which of the following statements would be correct with reference to fossil evidence that contradicts molecular evidence?
A) The contrary fossil evidence will be seen as a hoax.
B) The fossil evidence will be understood to have been interpreted incorrectly because it is incomplete.
C) The fossil record will, henceforth, be ignored.
D) Phylogenies involving even the smallest bit of fossil evidence will need to be discarded.