subject
Biology, 01.12.2019 05:31 Rubendelarosa1529

Individuals can take a course of antibiotics to their immune system fight bacterial diseases. which of the following best explains why these antibiotics may lose their effectiveness against certain bacteria?

antibiotics have become diluted and weak because of a limited supply.

resistant bacteria are polyploidy and can resist the antibiotic, a trait that is passed on to their offspring.

some bacteria have randomly mutated to resist the antibiotic, and this resistance is inherited.

bacteria have purposefully directed their immune system to resist the effect of the antibiotic.

ansver
Answers: 3

Another question on Biology

question
Biology, 21.06.2019 22:00
What is the primary goal of human communities?
Answers: 1
question
Biology, 22.06.2019 03:30
Rease is an enzyme used by plants to break down urea (a nitrogen-containing compound) into carbon dioxide and ammonia. urease urea > > > carbon dioxide and ammonia ammonia is broken down by plants into a nitrogen source plants need to grow. thus, plants could not use urea as a nitrogen source unless it was first converted to ammonia. in soybean plants there are two different kinds of urease, one produced in the seeds and the other produced in the leaves of the plant. three types of soybean plants were used in a set of experiments: normal soybeans and two mutant strains, one lacking the urease in the seeds only (strain 1) and one lacking urease in the leaves only (strain 2). experiment 1 separate areas in a field were planted with normal, strain 1, and strain 2 soybeans. all types of soybeans appeared to grow, flower, and produce seeds equally well. there were no externally detectable differences among the strains. experiment 2 small pieces of plant leaves of equal weight were obtained from each type of soybean plant and separately placed on media in culture dishes. tissue growing in this way will become an unorganized clump of cells referred to as callus. to provide a controlled nitrogen source, half the tissue samples of each type were placed on media containing urea, and the other half of the samples were placed on media containing ammonia. after 30 days, the weight gain for each of the callus samples was determined. results are shown in the table below.
Answers: 2
question
Biology, 22.06.2019 03:30
The graph below compares the rates of reaction of a burning candle and an exploding firework. comparing chemical reactions what can you conclude from the graph? the reaction that causes a firework to explode requires less energy to start, and occurs more rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires less energy to start, and occurs less rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires more energy to start, and occurs less rapidly than the reaction that causes a candle to burn. the reaction that causes a firework to explode requires more energy to start, and occurs more rapidly than the reaction that causes a candle to burn. mark this and return
Answers: 2
question
Biology, 22.06.2019 04:30
The picture showed normal blood cells which are around and sickle cells which appear much longer people with sickle-cell suffer from the sickle cell anemia which is inherited diseaseit is caused by a change in gene responsible for production of hemo goblin this type of change is known as an
Answers: 2
You know the right answer?
Individuals can take a course of antibiotics to their immune system fight bacterial diseases. which...
Questions
Questions on the website: 13722361