In the Sonoran desert of the southwestern United States, scientists observed that population clusters of a small cactus were very pronounced around nests of desert woodrats.  They began to think the woodrat was somehow connected to the seeding of these cactus plants.  After years of counting and observing the woodrat nests and cactus plants, they collected the droppings of the woodrats and took them back to the lab to analyze them to see if they contained seeds of the cactus.  They also collected the droppings and transported them to other areas to see if this would bring about new population clusters of the cactus.They also programmed the data they had collected into a computer.  The computer program allowed the scientists to predict that increases in the woodrat population would result in increases in the cactus population, and likewise a decrease in woodrats would signal an impending decrease in cactus.The study described above is best categorized as

The difference between a nature reserve and a wilderness area is that people are allowed to visit nature reserves.

Bacteria and fungi are typically categorized as which of the following ecosystem components?

Submarines explore the

Which of the following is a social movement dedicated to the protection of the Earth’s natural capital?

Which of the following implies the greatest built-in momentum for population growth?

When organisms die, their nitrogenous organic compounds are converted to simpler inorganic compounds such as ammonia through the process of

Reintroduction of the wolf eventually reduced attacks on domestic cattle by what other species?

Genetic resistance to antibiotic drugs is an important example of

The size of the planet has significant influences that impact life on the planet.