How does the structure of the small intestine it to perform its function ?

Question#29: why does the tropical ocean have a greater temperature range than the temperate ocean?

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.

People with one sickle cell allele are not likely to get malaria. what is this an example of?