Most mutations
a. are helpful to an organism
b. are harmful to an organism
c. are fatal to an organism
d. have no effect on an organism
Ans: d. have no effect on an organism
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Which of the following is not a known function of RNAi?
A. directing the replacement of amino acids in an existing polypeptide B. protection against invading RNA viruses C. control of transposon activity D. chromatin structure
What is a biofilm?
a. a movie about biology b. a slimy covering around a bacterium that allows it to stick to surfaces c. a colony of prokaryotes and eukaryotes living together in a slime d. a substance put on microscope slides that allow microscopic details to be better seen e. a shiny substance that develops above an oil slick
Packaged food in the United States must have a nutrition label, but there is not a requirement that genetically modified food be labeled as such. Should food producers and distributers be required to identify products made from genetically modified plants or livestock?
1.Yes. I do not want to purchase or eat food that is not natural, and should be given all the information I need to make that choice for myself. 2.No. There is no scientific evidence that genetically modified organisms are harmful to humans. The technology allows us to better produce foods without the use of pesticides and herbicides, which can be harmful to human health. Therefore, it is not worth the added cost of requiring new labeling
The assumption that there was little free oxygen in
the earth’s first atmosphere is supported by evidence derived from the study of a. ancient iron-containing rocks. b. the ancient atmosphere. c. oceanic sediments. d. moon rocks that formed at the same time as the earth. e. none of these.