What tissue in the gastrula gives rise to muscle?
A) ectoderm
B) mesoderm
C) endoderm
D) gastrula
B
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A group of species at any taxonomic rank in a phylogeny is a
A. taxon. B. hierarchy. C. outgroup. D. genome. E. clade.
Post-translational modification of polypeptides includes
A. attaching lipids to the polypeptides. B. attaching sugar to the polypeptides. C. chemically changing some amino acids. D. removal of some amino acids. E. all of these.
If the probability of event A is 3/4 and the probability of event B is 1/4, then the probability of both A and B occurring at the same time is
A. 1/4. B. 1 or absolute certainty. C. 3/4. D. 1/2. E. 3/16.
Streptococcus pyogenes binds to plasminogen and then secrets _______ that creates plasmin that degrades tissue.
A. streptokinase B. M protein C. exfoliative toxin A D. hyaluronidase E. coagulase