Question 1

Biologists have discovered through research on bacteria that they can use enzymes from these organisms to make specific changes of their choosing in the DNA of living bacterial cells.Are these discoveries relevant to people in their everyday lives? Why or why not?

Accepted Answer

The fact that all organisms on Earth use the same genetic code means that techniques developed using bacterial DNA can be applicable to human DNA. This discovery could have practical applications in medicine, agriculture, and genetic engineering.

Question 2

In 1928, British bacteriologist Alexander Fleming made an accidental discovery.He noticed that a fungus had contaminated one of the agar plates he had streaked with a bacterial species to be studied.The fungus prevented the bacteria from growing in the immediate area surrounding the fungus.Upon further investigation, Fleming found that the fungus produced a substance that was the agent responsible for killing the bacteria.He called this substance penicillin.Given this information, which statement best explains why Fleming's discovery is relevant to the general public today?

Accepted Answer

Fleming's discovery of penicillin was the catalyst for the development of chemical antibiotics, which have saved countless lives by treating deadly bacterial infections.

Question 3

A research group hypothesizes that diet influences the distribution of bacterial species inhabiting the human digestive system.The researchers define two populations with very different diets-one in England and another in Africa-for sample collection.They take fecal samples from each group and measure the percentage of each species of bacteria present in the samples.How is this investigation classified and why?

Accepted Answer

This investigation is classified as a comparative study because it involves comparing the bacterial species distributions between two distinct populations with different diets, without controlling for all other variables that could influence the outcome.

Question 4

A couple of recent movies depict terrifying scenarios in which pathogenic bacteria or viruses kill most of the people they infect.Which statement best answers whether it is possible for such a scenario to occur in real life and explains why?

Accepted Answer

While modern medicine has developed vaccines and treatments for many diseases, it is possible for bacteria and viruses to evolve and develop new harmful characteristics. Pathogens with high pathogenicity and virulence can potentially cause widespread fatalities if they can quickly spread and overcome the immune response of the host population. Additionally, the misuse of antibiotics and other treatments can lead to the development of antibiotic-resistant strains of pathogens, which can further complicate treatment and increase mortality rates.

Question 5

Which is a reason to use statistics to evaluate data?

Accepted Answer

Statistics allow researchers to account for variation in scientific measurements, which is crucial for obtaining accurate and reliable results. By analyzing the data using statistical techniques, researchers can identify patterns and trends in the data, as well as any potential outliers or sources of error. This enables them to draw more robust conclusions from their experiments and evaluate their results with greater confidence.

Options A, B, and D are incorrect, as statistics do not provide a way to prove that a hypothesis is correct, exclude data that do not fit the hypothesis or predict experimental results. Option C is also incorrect, as considering the null hypothesis is an important part of statistical analysis.

Question 6

Refer to the table below.  A student created the table to categorize various scenarios as representing science or non-science.Which statement best evaluates the student's table?

Accepted Answer

The answer of Refer to the table below.  A...

Quiz 1: Studying Life

Biologists have discovered through research on bacteria that they can use enzymes from these organisms to make specific changes of their choosing in the DNA of living bacterial cells.Are these discoveries relevant to people in their everyday lives? Why or why not?

A couple of recent movies depict terrifying scenarios in which pathogenic bacteria or viruses kill most of the people they infect.Which statement best answers whether it is possible for such a scenario to occur in real life and explains why?

Which is a reason to use statistics to evaluate data?

Refer to the table below. A student created the table to categorize various scenarios as representing science or non-science.Which statement best evaluates the student's table?