REVIEW

Which of the following correctly describes viruses?

• non-living because they grow and develop
• living because they can use energy
• non-living because they cannot reproduce on their own
• living because they can maintain homeostasis

Why do viruses have projections on the outside?

• To send signals to other viruses.

• To maintain their structure.

• To attach to the host cell.

• To reproduce.

Viruses are...

• prokaryotic
• eukaryotic
• non-living
• endospores

The chicken pox is spread via contact from person to person. In order to prevent getting the chicken pox, you can get a vaccination. Is chicken pox caused by a virus or a bacterium?

• Bacterium
• Virus

Which of the following is a trait that a virus shares with a living organism?

• They use oxygen
• They have genetic material
• They grow
• They digest food

Which of the following is something bacteria and viruses have in common?

• they are both living
• they are both cells
• they can both cause disease
• they are both non-living

What do viruses need to reproduce?

• they need genetic material
• They need a host cell
• They need  bacteria
• They need insulin

Viruses can reproduce on their own

• False
• True

Reasons that viruses are considered to be nonliving is because

• They are not made of cells
• They cannot reproduce on their own
• They do not exchange gases
• all of the above

When a virus invades a living cell, its _______
takes over the cell's functions.

• outer coat
• genetic material
• core
• cytoplasm