A number of genomes have been sequenced in recent years: Escherichia coli, Saccharomyces cerevisiae, Caenorhabditis elegans, Drosophila melanogaster, and Mus musculus. What are the common names for these organisms?
What will be an ideal response?
bacterium, yeast, roundworm, fruit fly, mouse
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Macroscopically visible growths or clusters of microorganisms on solid media are called ________.
Fill in the blank(s) with the appropriate word(s).
Using bright-field microscopy to look at a slide prepared with a basic dye you observe cells under 400X magnification with a clear inner compartment within the cell. The cell is most likely a(n)
A) prokaryote. B) bacterium. C) archaeon. D) eukaryote.
Which of the following most accurately describes a polar covalent bond?
A. the interaction of a hydrogen connected to an atom with a high electronegativity, and an electronegative atom of another molecule B. the interaction of an atom with very high electronegativity and an atom with very low electronegativity C. the unequal sharing of electrons between an atom with a partial positive charge and an atom with a partial negative charge D. the equal sharing of electrons between atoms of identical or similar electronegativities E. None of these choices accurately describe polar covalent bonds.
Select the formula below that correctly represents the behavior of CO2 in the blood.
A. CO2 + H2O ? H2CO3 + CO B. CO2 + H+ ? HCO3+ ? H2O + H2CO3 C. CO2 + HCO3- ? H+ + H2O + H2CO3 D. CO2 + H2O ? H2CO3 ? HCO3- + H+ E. CO2 + H2CO3 + O2 ? H2O + CO2 + H2CO3