Microorganisms

Which of the following is a characteristic of viruses?

• They can reproduce on their own.

• They are made up of cells.

• They can only replicate inside a host cell.

• They are larger than bacteria.

Viruses can only reproduce with the help of a ​ (a)   cell. This is another reason that viruses are not considered ​ (b)   things.

• host
• living
• dead

Viruses CANNOT

• be crystallized.

• live in bacteria.

• cause disease in plants.

• reproduce on their own.

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.

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

Viruses are cells. 

• True 
• False

Tags

NGSS.MS-LS1-1

A virus needs a host cell in order to do which of the following?

• Grow

• Develop

• Reproduce

• Live

How can vaccines prevent people from getting sick if they aren't personally vaccinated?

• Herd immunity

• Immunosupression

• Plasmolysis

• Apoptosis

Answer explanation

In herd immunity, when a person is vaccinated they stop the spread of a virus to other people.

Edward Jenner invented the first modern ​ (a)   in 1796. Vaccines are substances that stimulate the production of ​ (b)   and provide immunity against a ​ (c)   .

• vaccine
• antibodies
• disease
• cell