Cystic fibrosis causes, among other things, excess mucus to be formed in the lungs. the mucus is very dry and caked, unlike the moist, more-fluid mucus of normal lungs. what effect do you think that has on the lung’s defenses?

Spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

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 keystone species is removed from an ecosystem