The fight-or-flight response in humans prepares the body to fight off or run away from
a potential threat. this response results from a series of nerve and chemical signals that
direct how cells function. this, in turn, determines the actions of organs in these situations.
some of the changes experienced by the individuals as part of this response include:
increased pulse rate
increased blood glucose levels
increased breathing rate

once the threat has passed, another series of changes returns the body to its original state. why must
this occur?

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.

The frequency of alleles in a population that is in hardy weinberg equilibrium? a . changes in each successive generation b. is less important than the frequency genotypes c. shows evidence of the process of natural selection d. remains the same over several generations

Which cell organelle is the site for photosynthesis? a. chloroplast b. endoplasmic reticulum c. golgi apparatus d. lysosome