OC Opportunity Class Placement VIP Practice Exam

READING — Questions 1 to 9 are based on the following passage. — — — "The Migratory Marvel: Monarch Butterflies" Each autumn, millions of Monarch butterflies embark on one of the most extraordinary journeys in the natural world — a migration of up to 4,500 kilometres from Canada and the northern United States to the oyamel fir forests of central Mexico. What makes this feat so astonishing is that no single butterfly completes the full round trip. It takes three to four generations to travel from Mexico back to Canada in spring, yet the generation that flies south in autumn — having never made the journey before — arrives at precisely the same mountain forests their great-grandparents left. Scientists believe Monarchs navigate using a combination of the sun's position, an internal circadian clock, and the Earth's magnetic field. The butterflies that undertake the southward journey live far longer than their spring and summer counterparts — up to nine months — a biological adaptation that allows them to survive the winter in Mexico before beginning the return trip north in early spring. Despite the Monarch's remarkable resilience, its population has declined sharply over recent decades. Illegal logging in Mexican overwintering forests, the widespread loss of milkweed plants (the butterfly's sole host plant for laying eggs) due to agricultural herbicide use, and the increasing unpredictability of climate patterns have all contributed to this decline. International conservation programs across Canada, the United States, and Mexico are now working to restore milkweed corridors and protect overwintering sites, offering cautious hope that the Monarch's extraordinary journey will continue for generations to come. — — — According to the passage, approximately how far do Monarch butterflies travel during their autumn migration?

Questions 2–30 and full explanations are VIP-exclusive.