Roundup Ready corn is a transgenic crop that is resistant to the herbicide Roundup (glyphosate). Which one of the following would be the greatest concern regarding Roundup Ready corn?
A) Transfer of Roundup resistance to other crops, such as soybeans
B) Eventual loss of this trait from Roundup Ready corn due to hybridization
C) Evolution of herbicide resistance in weeds that commonly infect cornfields
D) Lower yields produced by Roundup Ready corn
C
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Often before sunrise on a clear, calm, cold morning, ice (frost) can be seen on the tops of parked cars, even when the air temperature is above freezing because the tops of cars are cooling by a loss of
a. ?conduction. b. ?convection. c. ?latent heat. d. ?radiation. e. ?condensation.
What is the major source of chlorofluorocarbons implicated in the thinning ozone layer?
a) Chemical chloroforms used in preservation b) The burning of high sulfur coal c) Refrigerants and aerosol can propellants d) Fluoride treatment in municipal water systems
All of the following pollutants were targeted for reduction by 2010, according to The 1999 Protocol, except ________
A) ammonia B) sulfur dioxide C) VOCs D) nitrous oxide E) CFCs
During extension in divergent plate boundaries a rift valley forms as a central ________.
A. graben B. strike-slip fault C. subduction zone D. horst E. mountain range