Infectious Agents

Needs host cell to reproduce.

• Virus
• Bacteria
• Fungus
• Protozoan

Bacteria are prokaryotes which means they

• have a nucleus on their capsule
• do not contain a nucleus
• can live in environments with and without oxygen

Mold is classified into which of the following kingdoms?

• plantae
• fungi
• protista
• bacteria

What is an Infectious Disease?

• A particle that has its own genetic material but depends on other living things to reproduce.

• Unicellular organisms that have a cell wall and reproduce by mitosis or binary fission.

• A disease that is caused by pathogen and that can be spread from one individual to another.

• An organism that lives on and feeds on another organism, called a host.

Viruses are:

• Tiny infectious agents that can only multiply when they are inside a host, the living cells of plants, animals, or bacteria.

• Single-celled organisms that do not rely on a host.

• Organisms such as yeasts or molds that reproduce quickly in moist, humid environments.

Bacteria are:

• Tiny infectious agents that can only multiply when they are inside a host, the living cells of plants, animals, or bacteria.

• Single-celled organisms that do not rely on a host.

• Organisms such as yeasts or molds that reproduce quickly in moist, humid environments.

Fungi are:

• Tiny infectious agents that can only multiply when they are inside a host, the living cells of plants, animals, or bacteria.

• Single-celled organisms that do not rely on a host.

• Organisms such as yeasts or molds that reproduce quickly in moist, humid environments.

What is true about a virus?

• You can see them with a regular classroom microscope.

• They can reproduce on surfaces, like tables and chairs.

• They need a host to multiply.

• They cannot be passed from person to person.

T/F: Viruses can mutate, making them difficult to prevent or treat.

• True

• False

Unicellular organisms that have a cell wall and reproduce by mitosis or binary fission.

• Bacteria

• Fungi

• Virus

• Pathogen