Which best explains phototaxis?
a. swimming towards or away from the heat source
b. swimming towards or away from the magnetic source
c. swimming towards or away from the light source
d. swimming towards or away from the chemical source
Ans: c. swimming towards or away from the light source
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The bronchi and bronchioles leading to the lungs have an effective mechanism for trapping incoming microbes. This method consists of
A. airborne antibodies. B. roaming patrols in the airways. C. mucus and cilia. D. bacteriolytic enzymes.
A characteristic symptom of plague is
A) small red spots on the skin. B) swollen lymph nodes. C) rose-colored spots. D) recurrent fever. E) nausea and vomiting.
Using a negative stain, the cells would be colored while the background would be clear.
What will be an ideal response?
Which of the following is not a region of the vertebral column?
a. sacral region b. thoracic region c. cervical region d. coccygeal region e. cranial region