In a capsule stain, capsules can be seen as ___________ surrounding the cells.
A. Purple cells walls
B. Pink cell walls
C. Clear halos
D. A dark background
Ans: C. Clear halos
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Females who are heterozygous for a violence-associated mutation in the X-linked MAOA gene will display abnormal behavior
a. True b. False Indicate whether the statement is true or false
Which of the following mammalian airway structures acts as the "windpipe"?
a. the bronchus b. the trachea c. the larynx d. the bronchiole e. the pharynx
Robert Koch's studies on Bacillus anthracis established a sequence of experimental steps to prove that microbes __________.
a. cause disease b. recycle elements such as nitrogen c. produce antiviral compounds d. control insect pests e. can be altered to produce products such as human insulin
Chemotaxis refers to the ability to
A. move in response to light. B. move in response to a chemical. C. not move in response to a chemical. D. transport desired molecules into cell. E. None of the choices is correct.