Scientists have recently devised a new six-kingdom classification of organisms. according to the cladogram for the six-kingdom system
a) the eubacteria gave rise to all life on earth.
b) the archaebacteria gave rise to the eukaryotes.
c) the archaebacteria are classified as eukaryotic.
d) only the bacterial kingdoms have a common ancestor.

At which location in earth’s interior does the top density continue to increase as thickness decreases?

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 paleontologists use trilobite fossils as index fossils for various geologic time periods.