What happens to e. coli when lactose is not present?
a. the enzymes needed to break down lactose are continually produced.
b. the genes that produce the enzymes needed to break down lactose are not expressed.
c. e. coli is not able to survive without lactose.
d. the genes required to produce the enzymes that break down lactose are destroyed.

The human genome project is devoted to mapping the general dna sequence of our species. this could lead to the development of new medicines, as well as the possibility of using gene therapy to treat certain diseases. however, there are some ethical issues surrounding the mapping of individual genomes. one concern is a) that your genes may change over time, making the project useless. b) that insurance companies could discriminate based on genetic make-up. c) that since this has never been done before, we should probably not do it now. d) that sequencing our individual genomes is so expensive, it is a counter-productive strategy.

Human genes only differ by less than percent. a. 1 b. 6 c. 11 d. 16

2. which is the last step in the scientific method?