Answer:
The correct answer is - B.directional selection.
Explanation:
When a bacterial colony is exposed to an antibiotic the maximum number of the bacteria dies due to noo resistane and some of survive even with no or very less resistance to the antibiotic and reproduce.
Over many generations the survived and continuosuly divivng resitant bacteria become more and more with higher frequency and ultimately evolved to a resistance strain of the bacteria for the antibiotic. Such mutation is directional selection as the frequency of the resistance bacteria going from no resistance to a high amount of resistance is unidirectional and progresive.
Explanation:
This pollutant is ozone, carbon dioxide, sulphur dioxide, carbon monoxide.
I would think that if wind, water or mankind introduced itself, it would be potentially destroyed. The reason is because wind and water can abrade the fossil. Man may not know how to properly handle it and may damage it.
Answer:
The answer is B and D which they have 23 chromosomes
Explanation:
Answer:
Option (A).
Explanation:
Sociology may be defined as the subject that focus on the study of development and social interaction in society. Sociology is also known as the general science of the society.
Amy and Katherine are the member of same team and Amy shows fast development than Katherine. They both are competitor of each other. This is human behavior to jealous with the person that perform better than them. Here, the development of Amy makes jealous to Katherine and she starts disliking Amy.
Thus, the correct answer is option (A).
