Apaleontologist reviews publications of bird fossils in the islands of the caribbean sea and discovers most have been described from deposits in caves. he concludes most of the fossil species were cave specialists. however, another paleontologist examines the same data and publishes a different interpretation. she thinks the fossils are turning up in caves because fossils preserve better in caves. as a student in 211, you are asked to weigh in on the dispute, and your take is to:

Contrast how pollination is different among gymnosperms and angiosperms.

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.

20 the compound al(nh3)2 has atoms of nitrogen.