In the 1800s, many people living in the cities in the united states died of infectious diseases such as cholera, which is caused by a bacterium that pollutes water. cholera is no longer a major problem in the united states. what is the most likely reason for the elimination of cholera as a major disease? a. advances in medicine have led to cures for cholera. b. people have learned the importance of washing their hands. c. sewage treatment plants have eliminated such pathogens from drinking water. d. regulations have prevented factories from dumping pollution into lakes and rivers.

A. advances in medicine have led to cure cholera

A. advances in medicine have led to cure cholera

Explanation:

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.