Imagine that you fill a shallow tray with water and place a drop of red ink in one end of the tray and a drop of green ink in the other end. Which of the following is TRUE at equilibrium?
A) The concentration of each ink is higher at one end of the tray than at the other end.
B) No predictions can be made without knowing the size of the ink molecules.
C) The red and green inks are both uniformly distributed throughout the tray.
D) The red ink is uniformly distributed in one half of the tray, and the green ink is uniformly distributed in the other half of the tray.
E) The red and green ink do not mix at all.
C
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DNA replication is a ____ process
a. noncomplementary b. semiconservative c. semisynthetic d. mutational e. denaturation
Even if people want to use sustainable energy sources and technologies, several barriers can limit their use. Which of the following is NOT a potential barrier to more widespread use of sustainable development practices or technologies?
a. sustainable energy can be much more expensive to produce than nonrenewable options b. construction and use of sustainable energy technologies can use hazardous chemicals or generate hazardous wastes that need to be carefully disposed of to avoid polluting the environment c. construction fo sustainable energy production facilities can destroy habitat d. the technology for energy production and harvesting from some sustainable sources still needs to be optimized e. all of the above are potential barriers to use of sustainable practices
Which of the following best describes a "species"?
a. a group of individuals producing similar vestigial structures b. a group of individuals developed through selective breeding c. a group of populations with homologous structures d. a group of populations that evolved independently e. a group of similar fossils
A researcher studying a group of individuals of the same species living and interacting in a shared environment is said to be working at the level of a
A) biome. B) biosphere. C) community. D) population.