(30. While conducting research on Euglena, a researcher observed that the contractile vacuole ceased functioning yet the rest of the organism seemed healthy and active. Which of the following is MOST likely responsible for the cessation of contractile vacuole action? A. Moving the Euglena from a lighted to darkened environment. B. Moving the Euglena from a freshwater to a seawater environment. C. Moving the Euglena 10m a seawater to a freshwater environment. D. Lowering the pH of the medium from 7.0 to 6.5. E. Lowering the temperature of the medium from 20°C to 15°C.

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN:9781305967359
Author:STARR
Publisher:STARR
Chapter36: Digestion And Human Nutrition
Section: Chapter Questions
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(30. While conducting research on Euglena, a researcher observed that the contractile
vacuole ceased functioning yet the rest of the organism seemed healthy and active. Which of
the following is MOST likely responsible for the cessation of contractile vacuole action?
A. Moving the Euglena from a lighted to darkened environment.
B. Moving the Euglena from a freshwater to a seawater environment.
C. Moving the Euglena 1om a seawater to a freshwater environment.
D. Lowering the pH of the medium from 7.0 to 6.5.
E. Lowering the temperature of the medium from 20°C to 15°C.
Transcribed Image Text:(30. While conducting research on Euglena, a researcher observed that the contractile vacuole ceased functioning yet the rest of the organism seemed healthy and active. Which of the following is MOST likely responsible for the cessation of contractile vacuole action? A. Moving the Euglena from a lighted to darkened environment. B. Moving the Euglena from a freshwater to a seawater environment. C. Moving the Euglena 1om a seawater to a freshwater environment. D. Lowering the pH of the medium from 7.0 to 6.5. E. Lowering the temperature of the medium from 20°C to 15°C.
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