In Australia, the existence of unique species like kangaroos is due to the movement of tectonic plates over geologic time.
Answer the following statement true (T) or false (F)
True
Separation of continents from plate movement has isolated populations and allowed them to evolve under different environmental conditions into new species.
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Which of the numbered features is a pyroclastic flow?
A) 1
B) 2
C) 3
D) 4
E) 5
Cell division that results in cells containing only one chromosome from each pair is called
a. mitosis. d. meiosis. b. DNA. e. chance. c. replication
Which of the following is the best example of a positive feedback effect?
a. ?Melting ice exposes the dark surface of the ocean, which reflects less of the sun’s energy than ice. This heats the water and in turn, melts more ice. b. ?Melting ice exposes the dark surface of the ocean, which reflects more of the sun’s energy than ice. This heats the water and in turn, melts more ice. c. ?Melting ice allows ocean levels to rise and reduce the surface area of the remaining ice, slowing its melting rate. d. ?Aerosols block the sun’s radiation, slowing the melting of ice. e. ?Aerosols cause air pollution, which increases local drought conditions.
What is a functional group?
A. a group of hydrocarbons that can be used to make new materials B. a set of atoms bonded together that give molecules containing them similar properties C. a set of molecules that are grouped together to form a functional material D. a group that adds function E. none of the above