The dots represent a bacterial infection. sal was very sick with this bacterial infection. the infection was treated with antibiotics. sal seemed to get well, but in a few weeks, she was sick again. how can this be explained using natural selection? a) the antibiotics were ineffective to this strain of bacteria. b) the stronger, more resistant bacteria survived the antibiotics and reproduced. c) the antibiotics did not kill the bacteria; it only forced them to be dormant. d) antibiotics will only kill a portion of the bacteria, no matter how much medicine sal takes.

The galapagos island contain 13 species of finches four of the species are seen here it is believed that all of the species had one common ancestor and overtime

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.

If a cell is placed into a hypertonic environment, what will happen to it ? a)it will shrink or shrivel b)nothing c)it will burst d) it will expand or enlarge