Based on the results of Experiment 1, if Experiment 2 were repeated except that all the A. percula were fed Diet R, would the average SGRs more likely have been lower or higher for each group?
\nA. Incorrect. The description of Experiment 2 indicates that all fish were fed Diet T. The SGR for Diet T was 0.35 percent/day while the SGR for Diet R was 0.40 percent/day, which is 0.05 percent/day greater, not less, than the SGR for Diet T. Based on this information, if Experiment 2 were repeated but all the A. percula were fed Diet R, the average SGRs would more likely be higher, not lower.
B. Incorrect. The description of Experiment 2 indicates that all fish were fed Diet T. The SGR for Diet T was 0.35 percent/day while the SGR for Diet R was 0.40 percent/day, which is 0.05 percent/day greater, not 0.10 percent/day less, than the SGR for Diet T. Based on this information, if Experiment 2 were repeated but all the A. percula were fed Diet R, the average SGRs would more likely be higher, not lower.
C. Correct. The description of Experiment 2 indicates that all fish were fed Diet T. The results of Experiment 1 in Table 1 show that the SGR for Diet T was 0.35 percent/day while the SGR for Diet R was 0.40 percent/day, which is 0.05 percent/day greater than the SGR for Diet T. Based on this information, if Experiment 2 were repeated but all the A. percula were fed Diet R, the average SGRs would more likely be higher.
D. Incorrect. The description of Experiment 2 indicates that all fish were fed Diet T. The SGR for Diet T was 0.35 percent/day while the SGR for Diet R was 0.40 percent/day, which is 0.05 percent/day greater than the SGR for Diet T, not 0.10 percent greater.
","correct_answer":["C"],"equiv_key":"93b92b9d3d4c70febc90bc6c","has_media":false,"has_mathml":false,"has_table":false,"section_label":"Science","options":[{"label":"A","content_html":"Lower; on average, A. percula fed Diet R had an SGR 0.05 percent/day less than those fed Diet T.
","ord":0},{"label":"B","content_html":"Lower; on average, A. percula fed Diet R had an SGR 0.10 percent/day less than those fed Diet T.
","ord":1},{"label":"C","content_html":"Higher; on average, A. percula fed Diet R had an SGR 0.05 percent/day greater than those fed Diet T.
","ord":2},{"label":"D","content_html":"Higher; on average, A. percula fed Diet R had an SGR 0.10 percent/day greater than those fed Diet T.
","ord":3}],"passage":{"id":"act_quizme:science:q3:passage","source_id":"act_quizme","form_id":null,"section":"science","number":"3","kind":null,"title":"Science Quiz 3","content_html":"Amphiprion percula, a species of clownfish, are kept in many home aquariums. Two experiments were conducted to determine how diet and stocking density (number of fish per liter of seawater, fish/L) affect the specific growth rate (SGR; percent increase in length per day, percent/day) in A. percula.
\nExperiment 1\nEach of 12 identical 15 L tanks received 10 L of seawater having a salinity of 33 parts per thousand (ppt), a temperature of 27° degrees C, and a pH of 8.2. Salinity, temperature, and pH were kept constant over the course of the experiment. A. percula of similar lengths were selected, and their lengths were measured, in cm, with a ruler. Then they were equally distributed among the tanks at a stocking density of 1 fish/L. The tanks were then divided equally into 4 groups.
\nFor 4 months, each group was fed a different diet (Diets Q–TQ through T). Each group was fed the same mass of food 3 times daily. At the end of 4 months, the length of each fish was measured, in cm, with a ruler, and the SGR of each fish was calculated. The average SGR was then determined for each group (see Table 1).
\nTable 1\n| Diet | \nAverage SGR (percent/day) | \n
|---|---|
| Q | \n0.30 | \n
| R | \n0.40 | \n
| S | \n0.50 | \n
| T | \n0.35 | \n
The procedures for Experiment 1 were repeated except that each group was kept at a different stocking density, 0.5 fish/L, 1 fish/L, 2 fish/L, or 3 fish/L, and all fish were fed Diet T. At the end of 4 months, the average SGR was determined for each group (see Table 2).
\nTable 2\n| Stocking density (fish/L) | \nAverage SGR (percent/day) | \n
|---|---|
| 0.5 | \n0.50 | \n
| 1 | \n0.35 | \n
| 2 | \n0.25 | \n
| 3 | \n0.20 | \n
Tables adapted from João Chambel et al., “Effect of Stocking Density and Different Diets on Growth of Percula Clownfish, Amphiprion percula (Lacepede, 1802).” ©2015 by Springer.
","ord":3},"attribution":{"source_id":"act_quizme","source_name":"ACT QuizMe official practice questions","rights_holder":"ACT Education Corp.","canonical_url":"https://quizme.act.org/","retrieved_from":"https://quizme.act.org/","attribution":"Official ACT practice questions © ACT Education Corp., from the QuizMe practice quizzes at quizme.act.org.","disclaimer":"ACT® is a registered trademark of ACT Education Corp., which is not affiliated with, does not sponsor, and does not endorse this project.","license":"ACT Education Corp. copyright. Published free on the public web; not licensed for redistribution.","redistributable":false,"item_count":78},"equivalents":[{"id":"act_practice_pdf:pt1:science:014","source_id":"act_practice_pdf","source_item_id":"pt1-science-014","external_id":null,"program":"ACT","section":"science","category_code":"SIN","category":"Scientific Investigation","subcategory_code":null,"subcategory":null,"form_id":"act_practice_pdf:pt1","passage_id":"act_practice_pdf:pt1:science:p3","position":14,"scored":true,"layout_warning":null,"stem":"Based on the results of Experiment 1, if Experiment 2 were repeated except that all the A. percula were fed Diet R, would the average SGRs more likely have been lower or higher for each group?","stimulus":"","stimulus_html":null,"stem_html":"Based on the results of Experiment 1, if Experiment 2 were repeated except that all the A. percula were fed Diet R, would the average SGRs more likely have been lower or higher for each group?
","rationale_html":null,"correct_answer":["H"],"equiv_key":"93b92b9d3d4c70febc90bc6c","has_media":false,"has_mathml":false,"has_table":false,"section_label":"Science","attribution":{"source_id":"act_practice_pdf","source_name":"Official ACT full-length practice tests (PDF)","rights_holder":"ACT Education Corp.","canonical_url":"https://www.act.org/content/act/en/products-and-services/the-act/test-preparation.html","retrieved_from":"https://www.act.org/content/act/en/products-and-services/the-act/test-preparation.html","attribution":"Full-length ACT practice tests © ACT Education Corp., published free at act.org. Questions are retired items from previous ACT administrations.","disclaimer":"Extracted from a print-layout PDF: equations, figures and charts do not survive as text. Use the original PDF for anything that renders poorly. ACT® is a registered trademark of ACT Education Corp., which is not affiliated with, does not sponsor, and does not endorse this project.","license":"ACT Education Corp. copyright. Published free for personal test preparation; not licensed for redistribution.","redistributable":false,"item_count":342}}]}