Which of the following is not among the first line of defenses against infection?
a. resident bacterial populations d. skin
b. tears, saliva, gastric fluid e. complement
c. urine flow f. lysozyme
E
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Homo sapiens first appeared during the
A. Tertiary period. B. Cretaceous period. C. Mesozoic era. D. Quaternary period. E. Permian period.
One of the most common causes of intellectual disability in the United States is ____
a. congenital rubella syndrome b. cocaine addiction c. fetal alcohol syndrome d. the use of thalidomide by pregnant women e. the use of tetracycline by pregnant women
Which term from the Hardy-Weinberg equilibrium represents the frequency of the homozygous dominant genotype?
a. pq b. p 2 c. 2pq d. q 2
During protein synthesis in eukaryotes, what happens during RNA splicing?
A. The product of transcription, called the primary transcript, is cut and some pieces are joined back together to form the mature mRNA. B. The product of transcription, called the secondary transcript, is cut and some pieces are joined back together to form the mature mRNA. C. The product of transcription, called the primary transcript, is cut and some pieces are joined back together to form the mature tRNA. D. The product of transcription, called the primary transcript, is cut and all pieces are joined back together to form the mature mRNA. E. The product of translation, called the primary transcript, is cut and some pieces are joined back together to form the mature mRNA.