Answer:
Step-by-step explanation:
The other answers are not right.
How does a bacteria is resistant to an anabiotic first arise?
1.vaccines
2.through mutations
3. bacteria learns to be resistant
4.bacteria decides to be resistant
A bacteria cannot learn or decide or take a vaccine. It becomes resistant to antibiotic through mutations. The answer is 2.
how can doctors most affectively destroy the resistant bacteria?
1. Vaccines
2. Develop and use the new antibiotics
3. Give the patient’s fluid and rest
4. Isolate people who have illness
Vaccines prevent people from getting sick but cannot help sick people. Fluid and rest are not very effective treatment; neither is isolation. So the right answer is 2. Develop and use new antibiotics.
The most effective to fight against pesticide resistant weeds is to _.
1. Do nothing
2. Pull out the weeds by hand
3. Make pesticides more toxic
4. Continue to use the same pesticide
Do nothing or use same pesticide will accomplish nothing. More toxic is bad. So the right answer is 2. Pull the weeds out by hand.