Jezelyn needs to create a project that shows reproductive isolation in action and decides to make a video. which of the following would make the best project? a video that shows a large river that has penguin populations on both sides a video that shows penguin species that have different mating dances a video that shows a penguin that is laying eggs a video that shows penguins in a tidal pool and an open ocean

The right option is a video that shows penguin species that have different mating dances.

Reproductive isolation is the inability of animals of closely-related species to interbreed with one another successfully as a result of various differences which can be ecological, behavioral, psychological, or genetic. From the question given above, the difference in the mating dances of the penguin species will not allow the animals to unite and mate. This condition describes reproductive isolation.

it has one origin of replication, but it proceeds in two directions - d)

the alkaline earth metals (beryllium (be), magnesium (mg), calcium (ca), strontium (sr), barium (ba), and radium (ra)) are a group of chemical elements in the s-block of the periodic table with very similar properties: shiny. silvery-white. hopefully this ? i didn't fully understand the question