HEL ASAPPP
How does an oil spill affect organisms that come to the surface to breathe, like dolphins or sea turtles?

1. Oil sinks, so these organisms are not affected.

2. When these air breathing organisms come to the surface they rise above the oil to breath so they are not negatively impacted.

3. Oil only accumulates on the skin of these organisms, so this does not affect their breathing.

4. When these air breathing organisms come to the surface to breathe they risk ingestion of oil which can lead to sickness.

Which would best keep the oxygen cycle stable? a. cutting down jungles to create farmland b. eliminating parks in large cities c. dumping toxic chemicals into the ocean d. reducing the amount of deforestation d. reducing the amount of deforestation

How are mutations continually being generated in a population (what are some of the causes of mutatuions? ) explain

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.