SB4ab

Front

What is the main difference between bacteria and viruses?

Back

Viruses are nonliving organisms, while bacteria are living organisms.

Front

In the modern classification system, how are organisms classified?

Back

Organisms are classified based on evolutionary relationships.

Front

Which two organisms are most closely related in a given classification system?

Back

Look for organisms that share a more recent common ancestor.

Front

What characterizes organisms in the kingdom Archaebacteria?

Back

Organisms found in the kingdom Archaebacteria are prokaryotic.

Front

What does the endosymbiotic theory propose about the origin of mitochondria?

Back

The endosymbiotic theory proposes that mitochondria in eukaryotic cells arose from endosymbiotic prokaryotes that metabolized oxygen.

Front

What are prokaryotic organisms?

Back

Prokaryotic organisms are unicellular organisms that lack a nucleus and membrane-bound organelles.

Front

What are eukaryotic cells?

Back

Eukaryotic cells are complex cells that contain a nucleus and membrane-bound organelles.

Front

What is the significance of evolutionary relationships in classification?

Back

Evolutionary relationships help scientists understand how different organisms are related and how they have evolved over time.

Front

What is a common characteristic of all viruses?

Back

All viruses require a host cell to replicate and cannot reproduce independently.

Front

What is the role of mitochondria in eukaryotic cells?

Back

Mitochondria are the powerhouses of the cell, responsible for producing energy through cellular respiration.