Bacteria that generate reactions such as swelling of tissues, and fever in humans are an example of microorganisms that -
A. form mutualistic relationships with cells of other organisms.
B. break down the organic matter of dead plants and animals.
C. are pathogenic and are able to cause disease by killing host cells.
D. live in close association and provide resources for all plants and animals.
Answers: 2
Biology, 21.06.2019 13:30
Which of the following substances is not involved in the chemical reaction that pro- duces smog? a. sunlight b. particulate matter c. automotive exhaust d. ozone
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Which of the following is not an example of conflict between related individuals?
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How is the national wildlife refuge system similar to the pacific region coastal program? a. both programs are concerned with providing habitats for wildlife b. both programs are primarily concerned with preserving fish species c. both programs have set aside 150 million acres of land d. both programs are under the u.s. fish and wildlife service
Answers: 3
Biology, 22.06.2019 13:00
Astudy by solloch and et. al., in 2017, gives the map above which shows the frequency of alleles with a ccr5-delta32 mutations over 87 different countries. this mutation deletes the presence of a co-receptor (ccr5) on the outside of human t-cells (lymphocytes). some viruses, such as the one responsible for the black death and human immunodeficiency virus (hiv), require this receptor for attachment to host cells during the infection process. the black death was an epidemic that passed over northern europe during the 14th century killing nearly 60% of europeans. according to this information, which explanation best explains why northern europeans show a greater immunity for hiv than some other parts of the world?
Answers: 1
Bacteria that generate reactions such as swelling of tissues, and fever in humans are an example of...
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