Why are viruses not considered alive according to the cell theory?
They can't reproduce without a host.
Influenza, AIDS, and Smallpox are all caused by ______________.
viruses
What is the vector for Malaria?
mosquitoes
What do doctors prescribe to help with a bacterial infection?
antibiotic
Antibiotics only work on bacteria.
True or False
True
Which is true of both bacteria and viruses? They both______________.
are living, are nonliving, contain DNA
contain DNA
If you get strep throat, your doctor will likely prescribe Penicillin, which is an _________________ made from the Penicillum fungus.
antibiotic
What is the point of frequently washing your hands with soap and water?
To remove germs from your skin
Louis Pasteur studied how food spoiled. What did he learn when he investigated "spontaneous generation"--the belief that food just went bad all by itself?
-microorganisms in the air caused food spoilage, parasites cause disease, fermentation makes wine
microorganisms in the air caused food spoilage
Why are viruses not considered alive?
They need a host to reproduce.
If a bacteria can split into 2 cells in 20 minutes, how many bacterial cells would there be after 3 hours had passed?
~100, ~250, ~500, ~650
~500
Which of the following is most likely to spread an illness among people?
(a playground accident, acid rain, genetic mutation, a virus suspended in the air)
a virus suspended in the air
What is your best line of defense against spreading germs from one person to another? (Meaning: What is the best way to protect yourself from germs)
Wash your hands with soap and water.
How can a disease spread around the globe in 24 hours?
air travel
Why do people tend to get sick when it is cold outside?
What is the main limiting factor to bacterial reproduction?
(antibiotics, fungal creams, availability of resources)
availability of resources
An infection caused by a cut in the skin is the direct result of ____________.
(gene mutation, foreign cell invasion, allergic reaction)
foreign cell invasion
Humans with HIV can transmit the HIV virus to others even when they show no symptoms. What word describes the unaffected person who spreads the disease?
Carrier
Why do researchers study drug-resistant microbes?
OR
Find a drug that will work on those drug resistant microbes
After WWI, Spanish Flu killed over 50 million people worldwide. What word describes this occurance?
Pandemic
How do viruses affect other organisms?
They invade the cells of the host, using them to reproduce.
Why should you not take an antibiotic when you have the flu?
Why are diseases transmitted through animal bites not considered to be contagious?
Only the person bit is the one who gets infected.
What is the best explanation of Louis Pasteur's pasteurization of milk (heating it before placing it in sealed containers)?
The heat kills germs that could cause spoiling.
Damp conditions promote the growth of what 2 diseases?
(Strep throat, polio, athlete's foot, malaria)
Athlete's foot & Malaria