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Worksheets11A MICROBIOLOGY - END OF TEK TEST
Total questions: 10
Worksheet time: 3hrs 30mins
Microorganisms often lead to infection because they-
remain dormant within the host.
interfere with normal body functions.
cannot be prevented with vaccines.
promote the growth of healthy cells.
Microorganisms contribute most to maintaining the health of an ecosystem by performing which of the following functions?
Acting as a vector in the spread of disease
Assisting plants in pollination
Breaking down rock material to form soil
Cycling nutrients through decomposition
Which of the following is a beneficial relationship between microorganisms and other organisms?
Viruses causing diseases in the roots of various plants.
Bacteria metabolizing sugars in the fermentation of organic compounds.
Bacteria living in human intestines assisting in digestion.
Parasites infecting oak trees, preventing them from producing acorns.
Bacteria that generate reactions such as swelling of tissues, and fever in humans are an example of microorganisms that -
form mutualistic relationships with cells of other organisms.
break down the organic matter of dead plants and animals.
are pathogenic and are able to cause disease by killing host cells.
live in close association and provide resources for all plants and animals.
Microorganisms are able to disrupt ecosystems by-
using anaerobic processes to break down glucose.
causing infection among many types of organisms.
making nutrients available to other organisms.
decomposing organic matter of plants and animals.
Which of the following statements best describes a role of beneficial bacteria in an ecosystem?
They make nitrogen available to other organisms.
They use many of the nutrients in the atmosphere.
They release chemicals that are toxic to certain living things.
They exchange gases with their surrounding atmosphere.
Some microorganisms form a relationship with other, host organisms. The host organisms feed the microorganisms, and the microorganism aids some process of the host organism. Which statement best summarizes this relationship? Some microorganisms -
can be harmful to specific host cells of other organisms.
can act as parasites within cells of organisms.
can be beneficial to specific host organisms.
form relationships that disrupt ecosystems.
Certain bacteria live in the intestinal tract of other organisms. Which of the following statements describes how these microorganisms help maintain the health of other organisms?
They produce antibiotics which destroy other microorganisms.
They metabolize substances and break down food during digestion
They decrease the amount of vitamins in the large intestine.
They purify food as it travels through the digestive system and remove contaminants.
Microorganisms can be pathogens when they cause an imbalance in homeostasis in organisms, causing them to become ill. Which of the following is one way that microorganisms can disrupt the health of other organisms?
They can produce antibiotics.
They can release harmful toxins
They can release vitamins.
They can only infect viruses.
The health of some organisms is helped by certain microbes when these microorganisms -
assist in the breakdown of food and produce vitamins.
cause disease by releasing toxins and killing host cells.
infect the leaves and roots of trees in an ecosystem.
reduce available oxygen in aquatic ecosystems.
