Marsupials survived in australia (as opposed to asia) because
a. continental drift, caused by plate tectonic processes, allowed eutherians to invade asia and the americasb. marsupials were better adapted to the climatic conditions of australia than were eutheriansc. australia had separated from pangea, and eutherians were not able to invade australiad. marsupials were, and are, better competitors than eutherians

The correct answer is: b. marsupials were better adapted to the climatic conditions of Australia than were eutherians.

Explanation:

Continents moved according to the tectonic plates and continental drift causing climate change, warmer to the places nearer the equator and colder to the places closer to the poles. Reason why some of the species survived better in certain circumstances regarding the weather as it was the case of the marsupials in Australia. Once continents got separated from the Pangea (One only continent) Species of animals and plants were separated too, a sample of this information has been proved with the findings of same species fossils in different places around the world.

answer:

d. because dr. laguardia selected a widely used measure, his study generalizes to has strong external validity. external validity has limited external validity. other applications of this measure.

the widely used measure that he applied to his experiment was the benton facial recognition test. it employed on to football players and as result, only players who suffered brain concussions did not pas this test. and although it has an external validity, it is limited because it isn't general to apply to other population.