Biology, 23.08.2021 18:50 chutchins0406
Drug-resistant tuberculosis is a major health issue in many countries. Treatment for these resistant forms of bacteria is longer and requires more expensive antibiotics. Scientists attribute this to natural selection. Under these circumstances, what does natural selection mean?
A. The tuberculosis genes mutated to avoid being killed by the antiblotic
B. Tuberculosis bacteria discovered a way to avoid these particular antibilotics.
C. An environment was created in which the tuberculosis bacterium carrying the antibiotic-resistant genes could reproduce.
D. The antibiotic changed the DNA of the tuberculosis bacterium.
Answers: 3
Biology, 22.06.2019 10:10, kdfawesome5582
Which example describes a mutualistic relationship between organisms? young wasps prey on caterpillars. crabs eat the remains of dead fish. tapeworms feed on food in the intestines of cats ants protect a tree on which they feed.
Answers: 2
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