AccelePrep for the ACT Test 2nd Edition Student Text

P OWER U P ! T HE E XCLUSIVE C AMBRIDGE S AMPLE E XAM • 289

11. Which of the following graphs most accurately represents the average growth of the coleoptile segments as a percentage of original length for ‡•– ͳ ‹ š’‡”‹‡– ͳǫ A.

Table 3: Inhibition of Growth of Coleoptile Segments by KCN

Total Percent Growth

Solution

Growth substance alone 23 Growth substance 2 10 4 # M KCN 5 Growth substance 1 10 3 # M KCN 2 Growth substance 2 10 3 # M KCN –4 Growth substance 2 10 2 # M KCN –3 Water 2 10 2 # M KCN –4 8. Š‡ DzϐŽƒ‰ Ž‡ƒ˜‡•dz ”‡ˆ‡””‡† –‘ ‹ –Š‡ ‹–”‘†—…–‘”› paragraph of the passage correspond to which of –Š‡ ˆ‡ƒ–—”‡• •Š‘™ ‹ ‹‰—”‡ ͳǫ F. Plumule G. Endosperm H. Coyledon J. Root 9. According to the information provided, the greater growth rate recorded in Test 2 in Experiment 1 is explained by the: A. addition of growth substance to the water used to immerse the coleoptiles. B. production by the coleoptiles of additional growth substance following clipping. C. retention by the coleoptiles of growth substance already present in the plants. D. metabolism by the coleoptiles of a growth substance present in the air. 10. Which of the three experiments used water and ‘ ‰”‘™–Š •‘Ž—–‹‘ǫ F. Experiment 1 only G. Experiment 2 only H. Experiments 1 and 2 only J. Experiments 2 and 3 only

B.

C.

D.

12. According to the data provided, the greatest growth of the coleoptile segments after 24 hours was for which concentration of growth substance in solution (in standard units per …—„‹……‡–‹‡–‡”Ȍǫ F. 0 G. 1 H. 10 J. 80

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