On a very hot summer day and a few months later on a very cold winter day, you go outside and take your
temperature. Each time your body temperature is 37 degrees Celsius. This example illustrates ____.
a. adaptation
b. cellular reproduction
c. respiration
d. homeostasis
e. digestion
ANSWER: d
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Which of the following statements is true regarding the bacteria present in the stomachs or intestines of humans?
A. Some stomach bacteria have been associated with cancers. B. Many intestinal bacteria aid in digestion. C. Intestinal bacteria can produce important vitamins. D. Intestinal bacteria may play a role in immune system function. E. All of these answer options are correct.
Suppose a marine microbiologist wanted to assess the microbial community in a milliliter of sea water. Which of the following technique(s) may be useful to help them enumerate a specific genus or type of microbe?
A. Most probable number (MPN) technique B. DAPI nucleic acid stain C. Catalyzed reported deposition-FISH (CARD-FISH) D. Fluorescence activated cell sorting (FACS)
Explain the function of each of the following structures in regards to muscle contraction: actin filaments, Ca+ ions, myosin filaments and ATP.
What will be an ideal response?
After binding to an infected cell, the cytotoxic T cell
A) releases histamine. B) becomes a phagocytic cell. C) neutralizes the infecting bacteria or viruses. D) releases a protein called perforin.