SAT Practice6fec40ff-b4f1-4439-8f08-ba70ddaff0ed
Practice one SAT question at a time
Questions come from the Bluebook question bank.
- The following 2 lines are shown:
- Alboran Sea
- Mauritanian coast
- The Alboran Sea line:
- Begins at 2 thousand, 63.2 micromoles per mole
- Rises sharply to 4 thousand, 99.5 micromoles per mole
- Falls sharply to 6 thousand, 68.4 micromoles per mole
- Rises sharply to 8 thousand, 83.2 micromoles per mole
- Falls sharply to 10 thousand, 32.5 micromoles per mole
- Rises sharply to 12 thousand, 57.9 micromoles per mole
- Falls gradually to 14 thousand, 55.7 micromoles per mole
- Rises gradually to 16 thousand, 64 micromoles per mole
- Falls sharply to 18 thousand, 51.6 micromoles per mole
- Falls sharply to 20 thousand, 41.6 micromoles per mole
- The Mauritanian coast line:
- Begins at 2 thousand, 12 micromoles per mole
- Rises gradually to 4 thousand, 15.4 micromoles per mole
- Falls gradually to 6 thousand, 14 micromoles per mole
- Falls gradually to 8 thousand, 13.3 micromoles per mole
- Rises gradually to 10 thousand, 16.5 micromoles per mole
- Falls gradually to 12 thousand, 15.8 micromoles per mole
- Rises gradually to 14 thousand, 19.1 micromoles per mole
- Falls gradually to 16 thousand, 13.2 micromoles per mole
- Rises gradually to 18 thousand, 14.7 micromoles per mole
- Falls gradually to 20 thousand, 12.2 micromoles per mole
The population of the coral Lophelia pertusa declined significantly around 9,000 years ago in the Alboran Sea and around 11,000 years ago near the Mauritanian coast. Using the ratio of manganese to calcium, which inversely correlates with ocean oxygenation levels, marine scientist Rodrigo da Costa Portilho-Ramos and colleagues evaluated whether oxygenation played a role in the declines of L. pertusa. The researchers concluded that oxygenation may have been important in the Alboran Sea but not near the Mauritanian coast, since ______blank
Which choice most effectively uses data from the graph to complete the statement?