Biology, 13.11.2020 21:20, menagirl71953
A pathogenic strain of bacteria has become resistant to an antibiotic that once could kill it. What has happened to these bacteria to make this happen? (4 points)
a
The bacterial cells learned to remove the receptors on their cell surfaces, making it impossible for the antibiotic to attack them.
b
Most of the bacteria make changes to their DNA to protect themselves, making themselves immune to future attacks.
c
Some of the bacterial cells were able to produce toxins against the antibiotics, making them more likely to survive.
d
Only the few bacteria that were immune to the antibiotic survived and reproduced, making all their offspring immune to it as well.
Answers: 3
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Identify two examples of chemical reactions that you have encountered during the last week. identify an exothermic and endothermic reaction. explain.
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Por qué crees que los huevos con cáscara se llaman amnióticos?
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