... presentedunder the graph on the next page.– ACT SCIENCE REASONING TEST PRACTICE–308 Study 2At several sites beneath the Atlantic Ocean, a 50 m core was removed from 50 0,000-year-old ocean-floor marine ... temperatures. They foundthat periods of maximum cooling (peak glaciation) occurred 75, 000, 1 75, 000, 3 75, 000, and4 75, 000 years ago.63. The characteristics common to the studies is that both:a. ... weeks, what percentage of the total population would the Beetle Bspecies constitute?a. 15% b. 25% c. 75% d. 85% 62. Suppose another species of beetle, Beetle C, replaces Beetle A in Experiment 3....