Approximately 500 varieties of insectivorous plants, which trap animals for their sustenance, ... in the world.

In the northern and central parts of the state of Idaho ... and churning rivers.

Only when air and water seep through its outer coat ....

Not only ... generate energy, but it also produces fuel for other fission reactors.

Society in the United States has tried to encourage most of its immigrant minority groups, particularly those that are white, to join mainstream society. Historically, it has done this in two ways, described by figurative speech. First, the melting pot (from the container in which metals are melted to make such alloys as steel) is a term for American society suggesting that the people of different nations have given up their distinctive ways to become members of the dominant culture through (6) ... , the process by which people become like others around them, taking their norms as their own. Secondly, the salad bowl refers to the idea of cultural pluralism in which mainstream society acknowledges there is value in preserving the uniqueness of the subcultures that comprises it. In this time, minority groups are encouraged to maintain unique identities within the larger culture, and society accepts (7) ... as part of its own definition.

Society in the United States has tried to encourage most of its immigrant minority groups, particularly those that are white, to join mainstream society. Historically, it has done this in two ways, described by figurative speech. First, the melting pot (from the container in which metals are melted to make such alloys as steel) is a term for American society suggesting that the people of different nations have given up their distinctive ways to become members of the dominant culture through (6) ... , the process by which people become like others around them, taking their norms as their own. Secondly, the salad bowl refers to the idea of cultural pluralism in which mainstream society acknowledges there is value in preserving the uniqueness of the subcultures that comprises it. In this time, minority groups are encouraged to maintain unique identities within the larger culture, and society accepts (7) ... as part of its own definition.

When a resource such as nesting material or food is in short supply, some individuals survive and reproduce more effectively than others. For example, many birds require holes in trees as nesting places. If these are in short supply, some birds will be fortunate and find a good nesting site, others will occupy less suitable holes, and some may not find any. There may or may not be fighting for (8) ... of a site. If a site is already occupied, a bird may not necessarily try to (9) ... its occupant but just continue to search for another site. Those that successfully occupy good nesting sites will be more (10) ... in raising young than will those that must occupy poor sites or that do not find any.

When a resource such as nesting material or food is in short supply, some individuals survive and reproduce more effectively than others. For example, many birds require holes in trees as nesting places. If these are in short supply, some birds will be fortunate and find a good nesting site, others will occupy less suitable holes, and some may not find any. There may or may not be fighting for (8) ... of a site. If a site is already occupied, a bird may not necessarily try to (9) ... its occupant but just continue to search for another site. Those that successfully occupy good nesting sites will be more (10) ... in raising young than will those that must occupy poor sites or that do not find any.

When a resource such as nesting material or food is in short supply, some individuals survive and reproduce more effectively than others. For example, many birds require holes in trees as nesting places. If these are in short supply, some birds will be fortunate and find a good nesting site, others will occupy less suitable holes, and some may not find any. There may or may not be fighting for (8) ... of a site. If a site is already occupied, a bird may not necessarily try to (9) ... its occupant but just continue to search for another site. Those that successfully occupy good nesting sites will be more (10) ... in raising young than will those that must occupy poor sites or that do not find any.

Identify the one underlined that must be changed.

The surface of Mars is very complex and consists of a mixture of flat deserts, craters, volcanoes, and mountainous.

Identify the one underlined that must be changed.

There are more than eighty-four million specimens in the National Museum of Natural History's collection of biological, geological, archeological, and anthropology treasures.

Identify the one underlined that must be changed.

For five years after the Civil War, Robert E. Lee served to president of Washington College, which was later called Washington and Lee.

Identify the one underlined that must be changed.

Newtonian physics accounts from the observation of the orbits of the planets and moons.

Identify the one underlined that must be changed.

If someone has bitten by a snake, he/she should be put on his back and movement of any sort should be prevented.