Unit 2 Lesson 1

Question 1

Bacteria

Answer 1

A domain consisting of prokaryotes. They have a cell wall and reproduce by cell division

The domain bacteria has more individuals than all the other domains

They may be producers, consumers or decomposers

Question 2

Archaea

Answer 2

A domain made of prokaryotes. They are genetically very different from bacteria and have unique chemicals in the cell walls.
Some of the molecules in archaea are similar to the molecules in eukaryotes

Question 3

Binary Fission

Answer 3

Reproduction in which 1 single-celled organisms splits into 2

Both bacteria and archaea reproduce by binary fission

Question 4

How do bacteria exchange DNA?

Answer 4

Transformation - bacteria take up DNA from the environment

Transduction - a virus injects DNA into bacteria

Conjugation - a plasmid is transferred from 1 bacteria to another when the 2 bacteria temporarily join together

Question 5

Virus

Answer 5

A microscopic particle that cannot replicate on its own

Made of genetic material and a protein coat

Question 6

Viruses are not Living things because

Answer 6

They do not use energy from nutrients

They do not maintain homeostasis

They can’t grow
They do not respond to stimuli

Question 7

Host

Answer 7

A living thing that a virus or parasite uses for resources or shelter

Question 8

Endospore

Answer 8

Formed by bacteria during times when environmental conditions are harsh.
The bacteria are inactive
Made up of a thick, protective coating, the bacteria’s genetic material and its cytoplasm

Question 9

Lytic Cycle

Answer 9

The process by which viruses replicate