Which pair of organisms show convergent evolution?
a) despite being close relatives, cattle and giraffes have drastically different neck lengths.
b) ducks develop different mating dances to avoid mating with other ducks from different species.
c) a bluegill sunfish and a redear sunfish, closely related, have similar fin shapes and color patterns.
d) tasmanian devils and wolverines are both thick-bodied predators with crushing teeth and similar food sources, but they are not at all related.

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.

Identify the composition of oceanic and continental crystal rocks. in a model of earth’s interior, where would these rocks appear?

The table below shows data for a population of fish in a pond. fish body color # of fins scales? tail shape a silver 4 yes fan b pink 4 yes flat c black 4 yes fan d orange 4 yes flat e orange 4 yes fan f silver 4 yes flat which of the above characteristics would be most in developing a classification system for the fish? a. body color and tail shape b. presence of scales and tail shape c. body color and number of fins d. number of fins and presence of scales