Answer:
<h2>
Antibiotic resistance had become very common now a days. People develop antibiotic resistance if they do not take antibiotics according to the prescription by the physician. </h2>
Explanation:
a. Actually the statement given by the friend is absolutely correct. The person has developed a resistance against the antibiotic he had taken to treat the strep throat. The infection has redeveloped and when he had the same antibiotic for strep throat it will become ineffective.
b. This happens because he had stopped taken the complete course of the antibiotic as prescribed by the doctor. If the bacteria changes its shape or removes the effectiveness of the particular antibiotic, resistance develops. The infection has redeveloped may be due to any change in the bacteria or ineffectiveness of the particular drug.
The correct option is A.
Allopatric speciation is said to occur when a particular biological population of the same specie get separated from each other to the extent that their isolation prevent them from exchanging genetic materials with each other through reproduction. This type of speciation is also called geographical speciation because, the population usually get separated geographically with one been removed or restricted to a new location. This kind of separation of specie leads to the development of divergnet adaptations.
I believe B because the world has changed in many conditions over time and the other questions fall into the aspect of Environmental change in conditions
Answer:
La formulación clásica de selección natural establece que las condiciones de un medio ambiente favorecen o dificultan, es decir, seleccionan la reproducción de los organismos vivos según sean sus peculiaridades. La selección natural fue propuesta por Darwin como medio para explicar la evolución biológica.
Explanation:
Um could you make the question more organized i cant tell what the answer choices are