Which of the following ciliates produces the disease ick in fish?
A. Nyctotherus
B. Balantidium
C. Ichthyophthirius
D. Entodinium
Answer: C
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On which portion of the visual system is the image upside down and backwards?
a. cornea b. lens c. retina d. occipital lobe e. visual cortex
Scientists have warned doctors of the danger of their increasing use of antibiotics (for instance, penicillin) for treating minor illnesses. They are concerned because ____________.
A) humans will become tolerant to the effects of drugs B) excessive use of these drugs leads to a diminished sensitivity to them C) strains of microorganisms that are resistant to these drugs will be selected D) the drugs will be metabolized more quickly by our bodies, decreasing their effectiveness E) none of these
The three shapes of bacteria are
What will be an ideal response?
The concept of a prokaryote was first fully outlined in 1962 by ________.
A. Stanier and Van Niel B. Hershey and Chase C. Watson and Crick D. Gilbert and Cech