Which of the following is NOT a recycled
element of an ecosystem?
a. water
b. phosphorous
c. oxygen
d. energy
e. more than one of these
D
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Which one of the following structures are found in the hindbrain?
A. cerebral cortex B. cerebellum and pons C. limbic system D. thalamus and hypothalamus
Which part of the nephron acts as a countercurrent multiplier?
A. loop of Henle B. proximal convoluted tubule C. distal convoluted tubule D. collecting duct E. All of these structures act as countercurrent multipliers.
In a person with cystic fibrosis, the mutation
causes which of the following to happen?
a. the protein clings to the inner surface of the plasma membrane b. the protein never leaves the endoplasmic reticulum c. the protein is shuttled to the nuclear membrane instead of the plasma membrane d. the protein is shuttled to the plasma membrane instead of the nuclear membrane e. the protein is expelled from the cell by exocytosis before it can do its job
The carbohydrate tree added to proteins targeted to the primary lysosome is added on an amino acid different from the amino acid where the carbohydrate tree is added to a transmembrane protein.
a. true b. false