MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Criteria for Autogamy to Take Place

Which of the ...

Question

Which of the following explains that within 2 years of the introduction of a new antibiotic, bacteria shows resistance to that antibiotic?

A

Divergent evolution

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

Adaptive radiation

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

Directional selection

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

D

A and C only

No worries! We‘ve got your back. Try BYJU‘S free classes today!

E

A, B and C

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B Directional selection
Divergent evolution leads to divergence of existing population by accumulation of adaptive traits. Adaptive radiation is diversification of organisms into different forms to fulfill various ecological niche. Directional selection refers to appearance of new trait in population and selection of population exhibiting the trait owing to its reproductive fitness. Antibiotic resistance is not result of evolution but selection of genes that confer resistance to the existing bacterial species and thereby increasing the frequency of the gene in the population i.e., directional selection.
Therefore, the correct answer is option C.

Suggest Corrections

thumbs-up

0

Similar questions

Q. The mechanism by which bacteria became resistant to the introduction of new antibiotic in less than 2 years is known as
I. Divergent evolution
II. Adaptive radiation
III. Directional selection

Q. Within a population of bacteria, some may have genes that give them resistance to antibiotics. If an antibiotic is introduced into their environment, the bacteria resistant to that particular antibiotic will survive and reproduce.
If a different antibiotic is used, different members of the population may survive due to a different resistance gene. The survival of the population in the presence of antibiotics depends on

Q. A new bacterial infection is spreading through a city. Doctors start prescribing penicillin but they soon find that the bacteria is resistant to the antibiotic. Testing reveals that a penicillin resistance gene is located on a plasmid that is increasing in the bacteria population through conjugation and selection due to the use of penicillin. Doctors start using rifampicin, another antibiotic that works through a different mechanism than penicillin.
Which of the following is most likely to occur in the bacteria population?

Q. Evolution i.e. changes in an organism to adjust to the environment, as suggested by Charles Darwin, is a very slow process that takes place over tens of thousands of generations, over millions of years. However, in bacteria, development of resistance to antibiotics, which is a type of evolution, takes place within our own lifetime. Can you say why it occurs so quickly in bacteria?

Q. Many bacteria are found to become resistant to a number of antibiotics simultaneously. This means that

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Pollination

BIOLOGY

Watch in App

explore_more_icon

Explore more

Criteria for Autogamy to Take Place

Standard XII Biology

Join BYJU'S Learning Program

CrossIcon