The process of making new DNA molecules is semi-conservative. This means that every new DNA molecule is composed of
A.) two completely identical strands of DNA.
B.) one original and one new strand of DNA.
C.) one strand of DNA and one strand of RNA
D.) two strands that mix original and new DNA.
Ans: B.) one original and one new strand of DNA.
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A researcher examines a piece of oak tree bark under a microscope. He notices many small holes or spaces within his bark sample. What are these areas?
A. stomata B. suberins C. pericycles D. lenticels
Mitosis and meiosis are similar in that ________
a. enzymes that repair DNA damage are critical to both processes b. each forms a bipolar spindle c. each sorts duplicated chromosomes into daughter cells d. all of the choices
Figure 44.6
The following question refers to the figure above illustrating logistic growth.
The effect of population growth limiting factors begins to become evident at about the letter ____.
A. A B. B C. C D. D E. E
Bacteria collected from a severely inflamed wound are sent to the lab for analysis. The results come back as follows: Gram-positive cocci in irregular clusters, kinase and coagulase positive, and able to grow in the presence of most antibiotics except vancomycin. The bacteria in the wound are most likely
A) Enterococcus. B) Staphylococcus epidermidis. C) Staphylococcus aureus. D) methicillin-resistant Staphylococcus aureus (MRSA). E) Streptococcus pyogenes (group A streptococcus).