Your science teacher asks you to build a model of a cell. the model should look like a city, and buildings in the city should represent parts of a typical cell. each building's real-life function should be like the function of the organelle it represents. for example, the vacuole of a cell, which stores water, could be a water tower in your cell city model. what building should represent the nucleus, and why? a). factory: manufacturing b). city hall: control center c). power plant: provides energy d). highways and streets: transportation

Which phrases describe an extrusive rock? check all that apply. fine texture cooled slowly small crystal size found deep underground different, easily observed minerals

The leopard frog and the pickerel frog are two closely related species. in areas where their ranges overlap, the frogs will remain separate species if they

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.