Which of the following describes the function of the myelin sheath?
a. insulating axons
b. protecting brain tissue
c. transmitting chemical signals
d. connecting the cerebral hemispheres
a. insulating axons
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Some bacteria in the deep oceans use iron as an
energy source to make carbohydrates from carbon dioxide. These bacteria would be classified as
a. chemoautotrophs. b. chemoheterotrophs. c. photoautotrophs. d. photoheterotrophs. e. decomposers
In photosynthesis, ATP is made by
A. the Krebs cycle. B. the passing of electrons from photosystem I to an electron transport chain. C. chemiosmosis. D. glycolysis. E. the Calvin cycle.
The goal of public health immunization is to reach herd immunity in the population
a. true b. false
As an undergraduate research assistant, your duties involve measuring water potential in experimental soil-plant-atmosphere systems
Assume you make a series of measurements in a system under normal daylight conditions, with stomata open and photosynthesis occurring. Which of the following correctly depicts the trend your measurement data should follow if the cohesion-tension mechanism is operating? A) ?soil < ?roots = ?leaves < ?atmosphere B) ?atmosphere < ?leaves = ?roots < ?soil C) ?soil < ?roots < ?leaves < ?atmosphere D) ?atmosphere < ?leaves < ?roots < ?soil