Some scientists believe that race is a. determined by culture b. a good way of classifying religious groups c. a good way of classifying humans d. socially constructed by humans

Advantages and disadvantages of mitigation and adaptation

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Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks