Allelopathy is a form of ________ competition.

TLS Online TPP Program

#Question id: 8926

#Section 2: Evolution

Sponges and cnidarians are among the fossilized animals found in both the Ediacara Hills and the Burgess Shale from the Rocky Mountains of British Colombia. This observation requires that

TLS Online TPP Program

#Question id: 8927

#Section 2: Evolution

Arthropods invaded land about 100 million years before vertebrates did so. This most clearly implies that

TLS Online TPP Program

#Question id: 8928

#Section 2: Evolution

An adult animal that possesses bilateral symmetry is most certainly also

TLS Online TPP Program

#Question id: 8929

#Section 2: Evolution

An obsolete taxon, the ʺRadiata,ʺ included all phyla whose adults had true radial symmetry. Today, the ʺRadiataʺ is more correctly considered to be

1. a clade.

2. a grade.

3. monophyletic.

4. paraphyletic.

5. polyphyletic.

TLS Online TPP Program

#Question id: 8930

#Section 2: Evolution

Soon after the coelom begins to form, a researcher injects a dye into the coelom of a deuterostome embryo. Initially, the dye should be able to flow directly into the

TLS Online TPP Program

#Question id: 8931

#Section 2: Evolution

A researcher is trying to construct a molecular-based phylogeny of the entire animal kingdom. Assuming that none of the following genes is absolutely conserved, which of the following would be the best choice on which to base the phylogeny?