What substance has been genetically engineered into "golden" rice to provide vitamin A, and where does it come from?
What will be an ideal response?
Beta-carotene has been genetically engineered into "golden" rice to provide vitamin A. It originally came from daffodils, but in later years, beta-carotene from corn was used.
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Transistors are used to amplify low-level signals into higher-level signals and to ____?
A. divide voltage B. permit current to only flow in one direction C. control air brakes D. act as an electronic switch similar to a relay
You have 29 moles of methanol (1) mixed with 42 moles of ethanol (2). What is the mole fraction (to 2 decimal places) of this mixture (x1)?
A. 0.41 B. 0.29 C. 0.42 D. 0.59 E. 0.69
What finally ended the Social War?
a. Sulla’s brilliant military strategy b. the recall of Marius to conduct the war c. the Senate’s offer of citizenship to the Italians d. the help of Mithridates, ruler of Pontus
A point or a center of an arc or circle is generally measured from two ____.
A. adjacent surfaces B. opposite surfaces C. finished surfaces D. relative surfaces