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Chapter 22: Q. 12 (page 570)

Organisms most likely to be found in extreme environments are ________.

a. fungi

b. bacteria

c. viruses

d. archaea

Short Answer

Expert verified

The organisms most likely found in extreme environments are bacteria.

Step by step solution

01

Explanation

The prokaryotes which include the bacteria and archaea both have thick cell walls and hence they are able to resist extreme environments like high salt concentration, extreme hot or cold environments, etc. The most likely which will found in extreme environments are bacteria. Viruses are acellular with no cell wall and hence can't resist the external extreme environments. Fungi are again the organisms which may be found in extreme environments but most likely are bacteria.

02

Final answer

Hence, the correct option is 'b'.

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Most popular questions from this chapter

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.

Imagine a region of soil became contaminated, killing bacteria that decompose dead plants and animals. How would this effect the carbon cycle in the area? Be specific in stating where carbon would accumulate in the cycle.

Synthetic compounds found in an organism but not normally produced or expected to be present in that organism are called _____.

a. pesticides
b. bioremediators
c. recalcitrant compounds

d. xenobiotics

Ammonification is the process by which _____.

a. ammonia is released during the decomposition of nitrogen-containing organic compounds

b. ammonium is converted to nitrite and nitrate in soils

c. nitrate from soil is transformed to gaseous nitrogen compounds such as NO, N2O, and N2

d. gaseous nitrogen is fixed to yield ammonia

Which of the statements about biofilms is incorrect?

  1. Biofilms are considered responsible for diseases

    such as cystic fibrosis.

  2. Biofilms produce dental plaque and colonize

    catheters and prostheses.

  3. Biofilms colonize open wounds and burned tissue.

  4. All statements are incorrect.
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