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Jaret Jackson1
Ch.7 #25-40
Question | Answer |
---|---|
Bacteria that cause disease are called bacterial. | pathogens |
__________, or poisons, are made by some bacterial pathogens. | toxins |
Some pathogens form thick walled structures called _____________ when environmental conditions are unfavorable: thus, they can survive for very long time periods. | endospores |
______________ can prevent some bacterial infections. | vaccines |
Vaccines are made from damaged or ____________ bacterial cells | dead |
Once injected, vaccines enable __________ blood cells on the body to recognize a particular type of bacteria and attack it if it appears at a later time. | white |
Describe the process of pasteurization. | pasteurization is the process where the food is heated to a temperature that can kill most of the bacteria without much effect on the taste of the food |
Describe how saprophytes help other organisms in the environment. | saprophytes break down dead organisms and neturn nutrients back to the environment for other organisms to use |
A. What kind of bacteria annually save farmers millions of dollars in fertilizer costs? B. What kind of plants have these bacteria in their roots? | A. nitrogen-fixing bacteria save farmers millions dollars B. peanuts and beans & pea plants have these bacteria in their roots |