HOMEWORK 20.1 VIRUSES

Describe how prokaryotes vary in structure and function. Scrapie is most likely caused by pathogens known as viroids. Match the bacterial control method with an example of the method Bacterial Control Method Example Describe three different ways that humans use bacteria. Some bacteria have a second Date. They damage the cells and tissues of the infected organism directly by breaking down the cells for host.

What kind of relationship do many plants have with nitrogen-fixing bacteria? The Importance of Prokaryotes Bacterial diseases can be prevented and treated through the following methods: Viral Diseases Viruses produce disease by directly destroying living cells or by affecting cellular processes in ways that disrupt homeostasis. What is a bacteriophage? Bacterial pathogens can produce many diseases that affect humans and other animals. They enter living cells and, once inside, use the machinery of the infected cell to produce more viruses.

A virus is a particle made of nucleic acid, protein, and, in some cases, lipids.

Moody, Alyssa / Chapter 20 – Viruses and Prokaryotes

In many viral infections, viruses attack and destroy certain body cells, causing the symptoms of the disease. Emerging Diseases An unknown disease that appears in a population for the first time or a well-known disease that suddenly becomes harder to control is called an emerging disease. Protective structure formed by a prokaryote when growth conditions are unfavorable E. Bacterial taxonomy wikipedialookup. Scrapie is most likely caused by pathogens known as viroids.

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Viruses produce other serious diseases in other animals and in plants.

CHEAT SHEET

Lesson Summary Bacterial Diseases Microorganisms that cause diseases are known as pathogens. Biology wikipedialookup.

Complete the table about the different ways prokaryotes obtain energy. Spirilla are spiral or corkscrew-shaped. Viruses must infect a living cell in order to reproduce. Viruses that have RNA as their genetic material are virusess. Using boiling water to clean dishes What would happen to plants and animals if decomposers did not recycle nutrients?

Viral Infections Viruses have two methods of infection once inside a host cell. Bacterial diseases can be prevented and treated through the following methods: Cell theory wikipedialookup.

Why should meat be cooked until it is well-done? What is a capsid?

homework 20.1 viruses

In a firuses infection, a virus enters a cell, makes copies of itself, and causes the cell to burst, releasing new virus particles that can attack other cells.

Explain how viruses cause disease. What are some human diseases caused by viruses? What occurs during conjugation? Some are decomposers that break down dead matter.

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Neurodegeneration wikipedialookup. They enter living cells and, once inside, use the machinery of the infected cell to produce more viruses.

homework 20.1 viruses

Archaea look similar to vuruses, but are genetically closer to eukaryotes. How could scientists determine whether it should be classified in domain Bacteria or domain Archaea? A person has a low helper-T cell count.

Eventually, the prophage will remove itself from the host cell DNA and make new virus particles. Although viruses are parasites, they are not made of cells and are not considered living things. Archaea lack peptidoglycan and have different membrane lipids than bacteria. Process in which a bacterium replicates its Homrwork and divides in half Complete each statement by writing the correct word or words.

Viral diseases in humans include the common cold, influenza, AIDS, chicken pox, and measles.

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