Question 26 Read each question carefully write your response in the space provided for each part of each question Answers must be written out in paragraph form. Outlines, bulleted lists, or diagrams alone
are not acceptable and will not be scored.
The unicellular green algo Chlorella is often used as a mel organism to study the effects of various substances on the growth of photosynthetic organisms. Researchers studying the
detoxification of certain metals by Chlorella first collected data on the growth dynamics of the algo. A small number of Chlorelle were added to 1,500 mL of culture medium that contained all of
the inorganic nutrients needed for growth Every five days for 30 days, the researchers performed multiple counts to determine the concentration of Chlorello in the culture (Table 1).
Table 1. The growth dynamics of a culture of Chlorella over a period of 30 days
Days Since Inoculation Concentration of Chlorella (> 10% per ml)
0.01 (0.005)
0.08 (0.01)
0,55 (0.1)
15
1.9(02)
20
2.8 (0.4)
3.2 (0.25)
30
32(0.3)
2SE values are shown in parentheses
5
10
25