The ________ promotes free trade by reducing obstacles to international commerce and enforcing fairness among nations in trading practices.

What is the name of the process where atmospheric nitrogen is converted to a form of nitrogen such as ammonia?

This United States law protects biodiversity.

When a population approaches its carrying capacity, its resources ________.

Where will you find epiphytes growing?

In a forest, the upper level of leaves and branches in the treetops is called the 

Read the following scenario and answer the question below.  In 1906, President Theodore Roosevelt created the Grand Canyon National Game Preserve on the Kaibab Plateau in northern Arizona. Between 1907 and 1923, cattle grazing was greatly reduced, mule deer hunting was eliminated, and predators were killed. Over 800 cougars, 20 wolves (most had already been killed in the 1800s), and 7000 coyotes were trapped or shot. In response, the mule deer herd began to increase: By 1915, deer numbers were estimated at 25,000; 50,000 by 1920; and 100,000 by 1923. Which of the following describes a graph of the Kaibab deer population between 1906 and 1923?

Read the following scenario and answer the question below. In the early years of the 20th century there were lush stands of tall grasses in the valley on the east side of the Chiricahua Mountains in Arizona, stretching to Mexico on the south and New Mexico on the east. Dramatic summer rainstorms dumped huge amounts of water, very quickly, on the rocky upper slopes. The water ran down the slopes and into the grasslands, where it quickly soaked into the soft, porous soil where prairie dogs were active. Cattle-ranching was in full swing, utilizing the rich grasses, but the ranchers did not appreciate the multitudes of prairie dogs that lived in the grasslands. Prairie dogs constantly dug through soil, making new burrows and eating grasses, roots and all. It was commonly believed that cattle and horses would stumble in the prairie dog holes and break their legs. In addition, many ranchers were convinced that the prairie dogs would destroy the grasses because they directly competed with the cattle for food. The ranchers had already done away with most predators that might possibly affect cattle (coyotes, bobcats, wolves, mountain lions, eagles, and rattlesnakes), and now they turned their attention to the prairie dogs. The ranchers became a part of a new federally sponsored movement to poison the grassland prairie dogs. This movement took root and spread through the 1920s and 1930s. One direct result of removing the predators may have been ________.

These are tracts of land managed by the United Nations that have exceptional biodiversity that couple preservation with sustainable development.

Read the statement below carefully. Answer True if you think a statement it TRUE. Answer False if you think the statement is FALSE. Give a brief explanation or example to justify your answer. The following are anthropogenic sources of potassium: sewage treatment effluent, fertilizers, and detergents.