In order to classify a mineral, scientists will sometimes scratch the mineral with a piece of unglazed porcelain and then analyze the color of the powder that this produces. which property does this test analyze?

a. hardness
b. fracture
c. luster
d. streak

Which experiment would most likely contain experimental bias ?

In the name staphylococcus aureus, aureus is thea. kingdom.b. specific name.c. genus.d. domain name.e. family name.

Which of the following is true of microbes? a. ninety-nine percent of all microbes are pathogenic.b. gene expression in bacteria is very similar to gene expression in humans, which facilitates the use of bacteria in recombinant biotechnology and gene therapy.c. all bacterial enzymes are harmful to humans and the environment.d. microbes create pollutants and toxins that harm the environment.