What key research question was addressed by King and others while studying sponges?
A. Do the genes of sponges contain information that might explain the rapid evolution of animal groups during the Cambrian explosion?
B. How similar is the DNA of living marine sponges to that of fossil sponges from the Cambrian?
C. Why were the sponges an evolutionary dead end, with little change and diversity since the Cambrian?
D. Did sponges survive the precambrian mass extinction, with genes unique from other animal groups?
E. Were the sponges the last common ancestor of eumetazoans?
A. Do the genes of sponges contain information that might explain the rapid evolution of animal groups during the Cambrian explosion?
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The vegetative parts of plants are the
A. flowers and fruits only. B. stems, roots, flowers, leaves, and fruits. C. roots, stems, and leaves. D. roots, flowers, and stems. E. fruits, flowers, and leaves.
Methicillin is an example of the beta-lactam class of drugs that
A) disrupts cytoplasmic membranes. B) inhibits cell wall synthesis. C) inhibits nucleic acid synthesis. D) inhibits metabolic pathways. E) inhibits protein synthesis.
Summarize some factors known to influence mutation rates of genes
What will be an ideal response?
Members of the ____ flatworm lineage are vertebrate endoparasites;some, called blood flukes, cause an often deadly
disease in humans called schistosomiasis.
a. Trematoda b. Turbellaria c. Polychaeta d. Cestoda e. Hirudinea