Traditional and molecular phylogenies disagree on which one of the following issues?
A. whether or not the Eumetazoa are monophyletic.
B. whether the Bilateria and Radiata split early into separate monophyletic clades.
C. whether the split between Parazoa and Eumetazoa occurred at a very early stage in animal evolution.
D. whether Echinodermata and Chordata are both deuterostomes.
E. whether the appearance and type of coelom is important in interpreting phylogeny.
E. whether the appearance and type of coelom is important in interpreting phylogeny.
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A growth medium that distinguishes among different groups of bacteria on the basis of their biological characteristics is called a ________ medium.
A. enrichment B. selective C. differential D. transport
Which of the following is a difference between prokaryotes and eukaryotes?
a. In prokaryotes, the DNA is sequestered inside the nucleus; in eukaryotes, it is in the cytoplasm. b. In eukaryotes, transcription starts with a final copy of mRNA; in prokaryotes, there is pre-mRNA, and it must be edited to make the final transcript. c. In eukaryotes, translation only occurs after transcription; in prokaryotes, they happen simultaneously. d. In prokaryotes, there are exons and introns; in eukaryotes, there are neither of these.
Populations of bay checkerspot butterflies that occupy large patches of suitable habitat serve as sink
populations for individuals that recolonize small patches of suitable habitat where butterfly populations frequently become extinct.
Indicate whether the statement is true or false.Sponges and worms belong to the domain ________
Fill in the blank(s) with correct word