This microscope produces an image of a light cell against a dark background; internal structures are NOT visible
A) compound light microscope
B) phase-contrast microscope
C) darkfield microscope
D) fluorescence microscope
E) electron microscope
C
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In many species, females choose among males on the basis of their ability to provide necessary resources. Males often establish an exclusive area that includes resources that females require for reproduction. This is called a(n) ____
a. home b. niche c. zone d. reproductive area e. territory
If you listen to a rock band at 130 dB, it may cause irreversible hearing damage. In contrast, tasting a boiling hot soup may burn your tongue but does not cause permanent damage. How can you explain this difference?
What will be an ideal response?
An ex-smoker with emphysema has a pulmonary erosion into his intrapleural space. What life-threatening condition is he at imminent risk of developing?
A) bacterial pneumonia B) pulmonary fibrosis C) pneumothorax (air leaking into the intrapleural space) D) adhesions to the parietal pleura E) acute respiratory distress syndrome (ARDS)
Which of the following attaches the target gene to a desired location?
a. DNA ligase b. Plasmids c. Restriction enzymes d. Chromosomal DNA