A) South America B) Africa C) Asia D) Europe E) Australia 22. What was the most radical anatomical change in human evolution? A) brain enlargement B) standing erect C) development of language D) loss of body hair E) development of culture 23. Read the following scenario to answer the following question(s). Birds are a widespread group of animals, with approximately 10,000 different species found throughout the world today. Because they are relatively easy to find and so visually appealing, they are better understood than many other groups of animals. They are also valuable biological indicators, with many species living in different habitats during different times of the year and covering long migration routes. According to the World Conservation Union, extinction threatens over 1,200 bird species today and at least 179 are critically endangered. Some of the most endangered species include the Tahiti monarch, with only 10 pairs remaining, and the Bali starling, with only 12 wild individuals left. In Hawaii, the last captive po ouli died in 2005 and the last two known to be alive in the wild have not been seen in many months. Common birds are also disappearing. In North America, red-winged blackbird populations declined by at least 1 percent each year between 1980 and 1999. These examples can serve as a warning. Habitat destruction, degradation, and fragmentation is the most serious problem and affects 86% of threatened birds. Unsustainable forestry and intensifying agriculture exacerbate this problem of habitat loss. All of this shows that conservation of habitats is critical if many of the world s bird species are going to be saved from extinction in the near future. What is the greatest threat to birds today? A) pollution B) poaching C) cellular phone towers D) habitat loss E) the illegal pet trade 24. Which of these animals exhibits segmentation? A) jelly B) grasshopper C) planarian D) sponge E) hookworm 25. Which of these primate groups is most closely related to hominids? A) apes B) Old World monkeys C) lorises D) lemurs E) New World monkeys