Alfred Wegener was a polar explorer who suggested that at one time, Earth's landmasses were joined into a supercontinent called Pangaea
Indicate whether the statement is true or false
True
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In his Pulitzer Prize-winning book, Guns, Germs, and Steel, Jared Diamond attributes the conquest by Europeans of the Americas, Africa, Pacific Islands, and portions of Asia to a host of factors. Which among the following is not mentioned by Diamond as a reason?
A. Eurasia's abundance of cultivatable plants B. Eurasia's supply of large animals suitable for domestication C. Eurasia's biological stock of advantageous racial characteristics D. Eurasia's east-to-west orientation of similar climates and landforms
The impact of global warming on the water cycle is expected to produce
A) more precipitation. B) fewer droughts. C) fewer and less severe hurricanes. D) greater agricultural productivity in currently water-stressed regions.
The blood-brain barrier is permeable to which of the following species?
A) oxygen B) carbon dioxide C) glucose D) all of these
What chemical weathering process is responsible for forming caves?
A. Dissolution B. Oxidation C. Hydrolysis