A modern example of an amphibian is ___________. Fill in the blank(s) with the appropriate word(s)
frog or salamander
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Pluto was discovered in 1930, becoming the 9th planet in the solar system. As telescopes improved, other Sun-orbiting objects were discovered. Some of those were even larger than Pluto. By 2005, it was becoming apparent that many more objects would soon be discovered and that the number of planets in the Solar System could swell to as many as 50. After much debate, scientists in the International Astronomical Union (IAU) concluded that Pluto and the other similar celestial bodies orbiting the Sun should be classified as "dwarf" planets. Since a "planet" must clear the space surrounding its orbit, our Solar system now has 8 planets.Why weren't the other Pluto-like objects discovered earlier?
A. Scientific explanations make predictions. B. Science is limited by technology. C. Scientific explanations are tentative. D. Scientific hypotheses are falsifiable.
Ecologists have identified ____ megadiversity countries that contain two thirds of all species.
A. 17 B. 24 C. 34 D. 44 E. 54
The mass of an electron is approximately which of the following?
A) 1 amu B) 1 g C) 0.0005 amu D) 0.0005 g
A person suffering from liver damage after a lifetime of alcohol abuse is experiencing ____.
A. a chronic effect B. a subchronic effect C. an acute effect D. a subacute effect E. superacute exposure