Which of the following best explains why an enzyme hasn't evolved to catalyze the following reaction as the first step of glycolysis? glucose + pi glucose-6-phosphate i. the use of atp is required for this step to serve as a regulatory control point. ii. the use of atp is important because it keep its concentration low. otherwise the high [atp] would slow glycolysis too much through feedback inhibition. iii. the large positive of this reaction would need to be overcome by an exceedingly high [pi]. iv. inorganic phosphate cannot be specifically placed on the carbon in the 6th position.

Which table best shows the impacts resulting from human activity? impact of human activities human activity impact forest area cleared to construct an airport increase in oxygen level vegetation cleared to construct an oil mine increase in pollution impact of human activities human activity impact forest area cleared to construct an airport increase in sound pollution vegetation cleared to construct a power plant contamination of water impact of human activities human activity impact beehives cleared from urban areas increase in vegetation dams constructed on a river increase in fish population impact of human activities human activity impact beehives cleared from urban areas increase in bird population dams constructed on a river better quality of water

Which is not a likely outcome after extensive irrigation of dry farmland? useless, unproductive soil salinization of the soil depletion of groundwater nutrient-rich soil

Vessels draining the myocardium of the heart, open primarily ,into which chamber?