Nate wants to see if changing the voltage across a resistor changes the amount of current that flows through it. He plans to run five trials to test a series circuit with one resistor in it. Which of the following should Nate keep constant in each trial? A. the current flowing through the resistor B. the resistance of the resistor C. the voltage across the resistor D. the number of trials he runs Reset

This is one form of rna that transports a specific amino acid to a ribosome during protein synthesis.

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

Examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. polyploidy is creating new species. the two populations are not interbreeding freely. hybrid offspring of the two populations begin to appear. one species will increase into a population size twice as large as the other species.