Which two ecosystems on the planet have the highest productivity and why (give one terrestrial and one aquatic)

Up to what percentage of the world's flora consisted of cycads during the triassic period? 100% 75% 50% 20%

Select the correct answer from each drop-down menu. which phase of mitotic division is the highlighted cell undergoing? the cell is undergoing , which is the stage before .

Anormal strand of dna is shown below, followed by the same strand of dna after mutations have occurred.