Gel electrophoresis is a technique that allows molecular biologists to make many copies of a particular gene true or false?

Aboy with an extra x chromosome probably has which of the following syndromes?

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

How much time has elapsed from the very beginning of "the memior of the conquistador bernal diaz del castillo" to the end? a. castillo's whole life b. a quarter of an hour c. a few weeks d. a decade