Structural class
What will be an ideal response?
Three types based on what material binds the joints and whether a cavity is present
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If a cell has the same concentration of dissolved molecules as its outside environment, the cell's condition is referred to as being
A. isotonic. B. hypertonic. C. hypotonic. D. hydrophobic. E. hydrophilic.
Answer the following statements true (T) or false (F)
1. Anton van Leeuwenhoek is given credit for developing the first compound light microscope. 2. The wavelength of visible light limits the size of objects that can be seen with the compound light microscope. 3. The resolving power of compound light microscopes can be improved by adding additional magnifying lenses. 4. A brightfield microscope can be converted to a darkfield microscope by replacing the condenser on a brightfield microscope with a darkfield condenser. 5. Primary syphilis is usually diagnosed in the clinical microbiology laboratory by the use of a scanning electron microscope.
In a fruit fly embryo, a homeotic gene Antp determines where legs grow. When the promoter of Antp is mutated, a fly ends up with legs growing out of its head in place of antennae. In this mutation
A. antennae grow where the legs would normally be found. B. Antp must be turned off in all of the fly cells. C. Antp must be turned on in the head. D. the Antp gene, and its transcription factor, and enhancer sequence are turned on in the head. E. the Antp enhancer sequence, or transcription factor, is not functional.
Which bacteria were FIRST discovered in Swiss cheese?
a. Serratia b. lactic acid bacteria c. Actinomyces d. propionic acid bacteria