The tool most effective at monitoring the anaerobic conditions caused by sudden spikes in the population of algae in a lake is the A) rain gauge. B) Secchi disc. C) thermometer. D) dissolved oxygen meter.

African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.

Did the vinegar diffuse all the way to the center of any of the cubes? if so, which ones? what does this tell you about surface area-to-volume ratio and the diffusion rate?

Development has provided electrically for less money but what may be considered a cause of nuclear power