Individuals of a single species fighting over access to a limiting resource would be an example of ________.

Green taxes ________.

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. A nation’s economic situation will not affect attitudes toward environmental issues.

Which of the following lists the steps of the scientific method in correct order?

Conventional law arises from ________.

Biodiversity enhances human food security because it ________.

Read the following scenario and answer the question below.  Despite the high cost of the technology to design genetically modified (GM) crops, American companies have invested in their development. The first genetically engineered crop was the Flavr Savr tomato, which was created by reversing the function of a normal tomato gene. It was approved by the FDA for sale in the United States in 1994. Its grower, the Calgene Corporation, maintained that it would ripen longer on the vine, taste and ship better, and last longer on supermarket shelves compared to conventional tomatoes. It is no longer marketed because of technical problems and public safety concerns. Today, most engineered crops are modified for insect and herbicide resistance. In 1997, Monsanto Company first marketed GM corn. This Bt corn was engineered using genes from the Bacillus thuringiensis bacteria that made the corn resistant to some pests. In 1999, environmentalists were alarmed when it was reported that pollen from Bt corn could kill monarch butterfly larvae if corn pollen drifted onto milkweed plants that monarchs fed upon. Consumers feared the unknown and were concerned about potential food allergies. Presently, corn, along with soybeans, cotton, and canola dominate the GM food market. These crops are grown and distributed mostly in the United States, Argentina, Canada, Brazil, and China. They are used mostly for animal feed, clothing, or to make oil or other ingredients for processed food, which has helped them gain public acceptance. Although GM crops such as strawberries, potatoes, and lettuce have all been marketed in the United States, GM food field trials involving biotech fruits and vegetables have dropped significantly during the past several years, and the pace of new product introductions has fallen sharply. This narrow range of crops could mean that biotechnology may not realize its full potential in the future. The Flavr Savr tomato is no longer marketed because ________.

Deforestation ________.

Read the following scenario and answer the question below. The western United States contains a series of tall mountain ranges that also extend far down into Mexico. Two of the largest of these ranges are the Rockies and the Sierra Madres, but they are all part of the same mountain-building event that occurred many millions of years ago, and they all have similar features. Much of the vegetation on these mountaintops is the same, or very similar, and they are often referred to as the “Sky Islands” because of their similarity to each other and their isolation from the lower, drier areas surrounding them. There are groups of tropical birds, such as trogons and parrots, that are usually considered to live in Central America and the mountains of southern and central Mexico. Small populations of these birds migrate into the United States each year. It is probably TRUE that ________.

Which of the following regulates the discharge of wastes into rivers and streams?