Changes in what frequencies are at the core of how evolution occurs?
What will be an ideal response?
Allele frequencies
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Which of the following is associated with dental caries?
A. Lactococcus lactis B. Enterococcus faecalis C. Streptococcus pneumoniae D. Streptococcus mutans
When studying fluid and electrolyte loss during exercise, Robert Cade found that human sweat has sodium and chloride concentrations that are ______ those found in the blood.
A. higher than B. lower than C. equal to D. extremely variable from person to person relative to E. There is no sodium or chloride in sweat.
Which of the following are the fundamental embryonic tissues called the "germ layers"?
A. tissues, organs, and organ systems B. mesoderm, muscle, and tissue C. ectoderm, endoderm, and exoskeleton D. mesoderm, endoderm, and ectoderm E. mesoderm, exoderm, and hydroderm
Virginia was working as an undergraduate lab technician, and the graduate student she was working with instructed her to take some E. coli, and treat the culture with MgCl2 and CaCl2 to make the cells competent. Once Virginia produced the competent cells, she was able to
A. make them susceptible to bacteriophage B. make them pass their DNA to a recipient cell via conjugation C. make them take up naked DNA from their environment D. make them replicate their own DNA without an origin of replication E. None of the answers are correct.