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Biology Chapter 6 : Topic 4
Three Domains of Life
1 / 15
Into how many broad domains are living organisms classified in the modern classification system?
Reasoning: Modern classification divides all living organisms into three domains.
2 / 15
Which set correctly represents the three domains of life?
Reasoning: The three domains are Archaea, Bacteria, and Eukarya.
3 / 15
Which domain includes organisms with a true nucleus?
Reasoning: Eukaryotic organisms possess a membrane-bound nucleus.
4 / 15
Which domain consists of prokaryotic organisms commonly known as true bacteria?
Reasoning: Domain Bacteria contains the true bacteria.
5 / 15
Which domain contains organisms that often live in extreme environments?
Reasoning: Many archaea are extremophiles that inhabit harsh conditions.
6 / 15
A microorganism lacks a nucleus but survives in hot springs. It most likely belongs to:
Reasoning: Many archaea inhabit extreme environments such as hot springs.
7 / 15
Which feature is shared by organisms in both Archaea and Bacteria?
Reasoning: Both Archaea and Bacteria are prokaryotic.
8 / 15
Which feature distinguishes Eukarya from Bacteria and Archaea?
Reasoning: Eukaryotic cells have a membrane-bound nucleus.
9 / 15
Humans belong to which domain?
Reasoning: Humans are eukaryotic organisms.
10 / 15
Which domain includes plants, animals, fungi, and protists?
Reasoning: All organisms with eukaryotic cells belong to Eukarya.
11 / 15
Which domain contains organisms that are more closely related to eukaryotes than to bacteria?
Reasoning: Archaea share several molecular features with eukaryotes.
12 / 15
What is the main basis for dividing organisms into three domains?
Reasoning: Domain classification is based on fundamental cellular and genetic differences.
13 / 15
Which of the following belongs to Domain Bacteria?
Reasoning: E. coli is a true bacterium.
14 / 15
Which of the following belongs to Domain Eukarya?
Reasoning: Yeast is a fungus and therefore a eukaryote.
15 / 15
Which statement about Archaea is correct?
Reasoning: Archaea are prokaryotes lacking a true nucleus.
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