Which statement best describes why electrons are typically not included when determining the mass of an atom?
the charge of a proton cancels the charge of an electron.
the protons and neutrons are much more massive than the electrons.
electrons have a negative charge.
electrons are located outside the nucleus.

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.

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.

Which best example best demonstrates the importance of having knowledge of evolutionary relationships? a. illustration of a plant b.organ transplantation between species c. blood donation from a human d. do you need sequence of an insect.