HOMEWORK 20.1 VIRUSES

Pathogens are able to evolve over time. Complete the table about the different ways prokaryotes obtain energy. Eventually, the prophage will remove itself from the host cell DNA and make new virus particles. Most prokaryotes are heterotrophs. Viruses must infect a living cell in order to reproduce.

Viruses must infect a living cell in order to reproduce. Why is the process of nitrogen fixation important? A n noninfectious disease is an unknown disease that appears in a population for the first time. The Importance of Prokaryotes Prokaryotes are vital to maintaining the ecological balance of the living world. A handful of antiviral drugs have been developed that help reduce the symptoms of specific viruses.

Protection against viruses, either by hygiene or vaccination, is the best way to avoid viral illness. Marine microorganism wikipedialookup. Using boiling water to clean dishes In a lytic 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. Most prokaryotes are heterotrophs.

Developmental biology wikipedialookup. 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.

The widespread use of vaccines has led to the emergence of resistant strains of bacteria. How are the causes of tuberculosis and diphtheria similar?

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Using bleach to clean a countertop What occurs when viruses get inside cells? In a lysogenic infection, how can one virus infect many cells? A handful of antiviral drugs have been developed that help reduce the symptoms of specific viruses. Antiviral drug wikipedialookup. Vectors in gene hojework wikipedialookup.

homework 20.1 viruses

Lesson Summary Bacterial Diseases Microorganisms that cause diseases are known as pathogens. The picture shows three different bacteria shapes.

Prokaryotes are classified either in domain Bacteria or domain Archaea. Preparation of weakened or killed pathogens or inactivated toxins used to produce immunity I.

Pathogens are able to evolve over time. The increase of worldwide travel and food shipments is one reason new diseases are spreading. They destroy living cells and tissues directly or by causing an immune response that destroys tissue. Some soil bacteria convert natural nitrogen gas into a form plants can use through a process called nitrogen fixation. Viral diseases in humans include the common cold, influenza, AIDS, chicken pox, and measles. Viral Infections Viruses have two methods of infection once inside a host cell.

CHEAT SHEET

Process in which a host cell bursts after being invaded by a virus J. They damage the cells and tissues of the infected organism directly by breaking down the cells for host.

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A vaccine can prompt the body to produce immunity to the disease. A protein coat surrounding a virus is a n.

homework 20.1 viruses

Complete the table about the different virusex prokaryotes obtain energy. Then, circle the step that shows lysis of the host cell. Process in which a bacterium replicates its DNA and divides in half Complete each statement by writing the correct word or words.

Moody, Alyssa / Chapter 20 – Viruses and Prokaryotes

Others are producers that viryses out photosynthesis. Some are decomposers that break down dead matter. What viral disease does he or she most likely have? Write the letter of the correct answer on the line at the left. Viruses must infect a living cell in order to reproduce.

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