Bacteria and Viruses

Place the steps of binary fission in order

• One bacterium

• Cell membrane pinches in two

• DNA replicates

• Two bacteria

Tags

NGSS.MS-LS3-2

Archaea lack a certain___________________ in their cell walls

What is one way to help avoid getting a viral disease?

• Washing hands

• Getting vaccinated

• Avoiding people

• Coughing into your elbow

Archaea have genes that are more similar to

• Eukaryotes than to those of bacteria

• Prokaryotes

• bacteria

• human genes

Tags

NGSS.HS-LS4-1

Why do scientists use a different system to classify viruses?

• Many scientists do not believe that viruses are alive

• Many scientists believe that viruses are living

• Many scientists do not believe viruses are real

Some bacteria have a small circular strand of DNA separate from their main chromosome called a ______________________

What is the purpose of a bacterium's flagellum?

• to help it move

• to swish in the wind

• to look pretty

• to make the bacterium camouflage

Tags

NGSS.MS-LS1-2

Two groups of prokaryotes are ​ (a)   ​ and ​ (b)  

• bacteria
• archaea
• flagellum
• endospore

What do bacteria have instead of a nucleus?

• chloroplast
• mitochondria
• cell wall
• nucleic acid

What is the protective protein coat of a virus?

• envelope
• membrane
• capsid
• nucleus