Question

using microscope slides and dipping them into the boiling hot springs at yellowstone national park, scientists were able to collect these organisms. they are unicellular, prokaryotes with a cell wall. what are they?
○ archaebacteria
○ protista
○ fungi
done

Explanation:

1. Analyze the characteristics of the organisms: unicellular, prokaryotes with a cell wall, and collected from boiling hot springs.
2. Recall the properties of different groups:

• Archaebacteria: are prokaryotes, many can survive in extreme environments like hot springs, are unicellular and have a cell wall.
• Protista: are eukaryotes (not prokaryotes), so this option is incorrect.
• Fungi: are eukaryotes (not prokaryotes) and most are multicellular (though some unicellular fungi exist, they don't typically live in boiling hot springs as a main habitat), so this option is incorrect.

Answer:

A. Archaebacteria