Question

Some hyperthermophilic organisms that grow in highly acidic (pH-2) habitats belong to the two groups?

• A. Protists and mosses
• B. Eubacteria and archaea
• C. Liverworts and yeasts
• D. Cyanobacteria and diatoms

Answer 1

The correct option is B

Eubacteria and archaea

The correct option is B.

Explanation of correct option:

1. Hyperthermophilic organisms are the organisms that can survive in the extremely hot environment - above 80°C.
2. Archaebacteria belong to the kingdom Monera and are classified as bacteria as they resemble bacteria when observed under a microscope.
3. Eubacteria also belong to kingdom Monera and are known as “true bacteria”.

Explanation of incorrect options:

Option A:

1. Protists are aquatic organisms - often found in freshwater or marine water.
2. Mosses are found in shady moist areas.
3. These species only require around 20^oC for their growth

Option C:

1. Liverworts are plants that can be found in damp moist areas.
2. Yeast belongs to the kingdom of Fungi and can be found anywhere.
3. Liverworts require only about 25-27^oC. Yeast gets killed at 55^oC.

Option D:

1. Cyanobacteria are blue-green algae that are mainly found in freshwater.
2. Diatoms are microscopic, single celled algae that have a cell wall made of silica
3. These species require temperature only around 10-30^oC

Final answer: Some hyperthermophilic organisms that grow in highly acidic (pH-2) habitats belong to Eubacteria and Archae