The collagen fibers in bone are secreted by osteoblasts
____________________ Indicate whether the statement is true or false.
True
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External economies (typically achieved in urban areas) result from all of the following except
A) shared labor markets. B) shared information and innovation. C) shared infrastructure. D) shared fixed social capital. E) shared profits.
Answer the following statements true (T) or false (F)
1. Animal biomass exceeds plant biomass in most ecosystems. 2. The amount of CO2 in the atmosphere is stable over a period of one year. 3. Insect densities tend to decrease in elevated CO2, all other factors being equal. 4. Biomagnification results in an increased concentration of bioaccumulated chemicals as one moves from upper to lower trophic levels.
The enzyme that breaks down ethanol is
alcohol
a. dehydrogenase. b. oxidase. c. peroxidase. d. catalase. e. protease
Which part of the nephron contains podocytes?
A. descending limb of loop B. glomerular capsule C. proximal convoluted tubule D. distal convoluted tubule E. ascending limb of loop