Chapter 22: Q. 16 (page 570)
Which of the following elements is not a micronutrient?
a. boron
b. calcium
c. chromium
d. manganese
The one which is not a micronutrient is calcium.
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Which of the statements about biofilms is incorrect?
Biofilms are considered responsible for diseases
such as cystic fibrosis.
Biofilms produce dental plaque and colonize
catheters and prostheses.
Biofilms colonize open wounds and burned tissue.
All statements are incorrect.
Which of the following consist of prokaryotic cells?
a. bacteria and fungi
b. archaea and fungi
c. protists and animals
d. bacteria and archaea
Explain the statement that both types, bacteria and archaea, have the same basic structures, but built from different chemical components.
Organisms most likely to be found in extreme environments are ________.
a. fungi
b. bacteria
c. viruses
d. archaea
Many of the first prokaryotes to be cultured in a scientific lab were human or animal pathogens. Why would these species be more readily cultured than non-pathogenic prokaryotes?
a. Pathogenic prokaryotes are hardier than nonpathogenic prokaryotes.
b. Non-pathogenic prokaryotes require more supplements in their growth media.
c. Most of the necessary culture conditions could be inferred for pathogenic prokaryotes.
d. Pathogenic bacteria can grow as free bacteria, but non-pathogenic bacteria only grow as parts of large colonies.
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