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Science Bacteria studyguide
study guide
20
Science
7th Grade
03/22/2012

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Term
What shape is the cocci?
Definition
sphere
Term
What shape is bacilli?
Definition
rod shaped
Term
What shape is spirilla?
Definition
spiral shaped
Term
What is the difference between aerobic and anaerobic bactera?
Definition
aerobic uses oxygen for respiration and anaerobic is adappted to living without oxygen
Term
What are the 2 kingdoms of bacteria?
Definition
eubacteria and circhaebacteria
Term
What is the common name of cyanobacteria?
Definition
blue-green bacteria
Term
Where can cyanobacteria be found?
Definition
lakes, ponds, and oceans
Term
How do most bacteria reproduce?
Definition
by fission
Term
How do bacteria help keep the world free from wastes?
Definition
they break down dead organisms
Term
Bacteria live in groups called colonies. Colonies are usually circular. The diameter of a particular bacterial colony is 20mm. The circumference of a circle is equal to pi times its dieameter. What is the circumference of the colony?
Definition
62.8mm
Term
What word on the milk carton tells you that the dairy eliminated pathogens when producing the milk?
Definition
pasteurized
Term
What process killls harmful bacteria without much effect on the taste of the food? Describe the process
Definition
pasteurization-process of heating food to a temperature that kills harmful bacteria
Term
What kind of bacteria causes dead organisms to erode?
Definition
saprophyte
Term
How does this change help other organisms in the environment?
Definition
the nutrients that the saprophyte broke down are avaliable to others now
Term
What kind of bacteria annually save farmers millions of dollars in fertilizer costs?
Definition
nitrogen- fixing bacteria
Term
What 2 kinds of plants have these bacteria in their roots?
Definition
peanuts and peas
Term
What can prevent some bacterial diseases?
Definition
vaccine
Term
What kind of drugs can kill bacteria?
Definition
antibiotics
Term
What are poisons produced by pathogen called?
Definition
toxins
Term
What are the thick walled cells of botulism bacteria called?
Definition
endospores
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