A twisted zipper is used as a model of eukaryotic DNA. How could the
model be developed to represent DNA replication in eukaryotes? Describe the
limitations of merely zipping and unzipping the zipper.

Compare and contrast nutrient limitation in soil vs. nutrient limitation in aquatic ecosystems

The hypothesis of continental drift states that earth's continents, which are located on tectonic plates, move relative to each other. which of the following is true of the movement of the tectonic plates? a. tectonic plates only move once every million years. b. they move at a rate of approximately 5 centimeters per year. c. tectonic plates never move, only the continents located on them do. d. their movements are very rapid and occur at random times.

What environmental cues and landmarks do the geese use to determine the timing and direction of their migration over the mountains? how do they find their way?