Domains and Kingdoms of Life

How many major groups are all life forms on Earth classified into?

• Three

• Two

• Four

• Five

Which domains consist of prokaryotic organisms?

• Bacteria and Archaea

• Archaea and Eukarya

• Protists and Fungi

• Bacteria and Eukarya

Where can Archaea typically be found?

• On the surface of plants

• In oxygen-rich waters

• In moderate environments

• In extreme conditions

What is the significance of archaea's ability to live in extreme conditions?

• It suggests they could exist on other planets

• It shows they are closely related to bacteria

• It indicates they are harmful to humans

• It means they are a recent evolutionary development

What role do beneficial bacteria play in our bodies?

• Cause diseases

• Support digestive and immune systems

• Break down eukaryotic cells

• Produce oxygen

Which domain's organisms are not closely related to the others, as indicated by studies of their ribosomal RNA?

• Bacteria and Archaea

• Archaea and Eukarya

• Eukarya and Protists

• Bacteria and Eukarya

What is a unique feature of the bacterial cell wall?

• Contains peptidoglycan

• Lacks peptidoglycan

• Made entirely of lipids

• Contains chlorophyll

How are the cell walls of Archaea and Bacteria different?

• Both have identical cell wall compositions

• Archaea's cell walls lack peptidoglycan

• Bacteria's cell walls are made of pure lipid

• Archaea's cell walls contain peptidoglycan

Which domain includes organisms with a membrane-bound nucleus?

• Archaea

• Bacteria

• Eukarya

• Protists

Which of the following is NOT a kingdom within Domain Eukarya?

• Fungi

• Bacteria

• Plants

• Animals