Glucose is used as an energy source only when proteins and fats are not available.
Indicate whether the statement is true or false.
Answer: False
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Which antibody class is found in exocrine secretions?
a. IgG b. IgA c. IgE d. IgD e. IgM
Which elements are responsible for the greater part of plant wet weight?
a. carbon, nitrogen, oxygen b. carbon, nitrogen, phosphorus c. carbon, oxygen, hydrogen d. carbon, hydrogen, potassium e. carbon, nitrogen, potassium
Roughly speaking, (1) one gram of carbohydrate is the equivalent of how many Calories? (2) one gram of fat is the equivalent of how many Calories? (3) one gram of protein is the equivalent of how many Calories?
A. (1) = 4, (2) = 9, (3) = 4. B. (1) = 7, (2) = 9, (3) = 4. C. (1) = 4, (2) = 4, (3) = 4. D. (1) = 4, (2) = 10, (3) = 4.
Clusters of phloem and xylem tissues are called
A. root tissue B. ground tissue C. pith D. vascular bundles