You put a solution of sucrose into a bag of dialysis tubing, which is permeable to water but not to sucrose. You then put this bag into a beaker of water. An hour later, you observe that the bag has swelled due to
A. passive transport of sucrose molecules.
B. the pressure exerted on the bag by the surrounding water.
C. the high osmolarity of the surrounding water.
D. active transport of water molecules.
E. the osmotic pressure of the sucrose solution.
Answer: E
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Three fatty acids bonded together with a glycerol are found in a(n):
A. enzyme. B. chlorophyll pigment. C. phospholipid. D. triglyceride. E. alcohol.
Which of the following sex chromosome abnormalities have detectable phenotypic effects? (Choose all that apply)
A. 47, XYY B. 47, XXX C. 45, X D. 47, XXY E. 47, +21
Negative control means a regulator molecule is
A. bound and transcription starts. B. removed and transcription is inhibited. C. bound and transcription is inhibited. D. removed and transcription starts. E. bound and transcription is inhibited AND removed and transcription starts.
The intermediate disturbance hypothesis posits which of the following?
a. Species richness is greatest in communities that experience infrequent moderate disturbances. b. Species richness is greatest in communities that experience high temperatures. c. Species richness is greatest in communities that experience frequent severe disturbances. d. Species richness is greatest in communities that experience frequent moderate disturbances. e. Species richness is greatest in communities that experience intense disturbances.