BRAINLIEST FOR MOST HELPFUL ANSWER. DNA is composed of four different nitrogenous bases. For the type of DNA sequence used by the Gizmo, a complete DNA sequence would have scan readouts for all four nitrogenous bases. Knowing this, why can you not be entirely certain the frogs are identical twins using the simplified sequences on the Gizmo?

On the Gizmo it only shows one DNA fingerprint scan, meaning that it scans only one out of the four nitrogenous bases. Therefore, it is not entirely accurate, resulting certain frogs not being entirely identical twins.

Explanation:

That good?

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.

b - the respond is innate and varies over time.

good luck!