Which on the following describes a cyclical change in an ecosystem? a) a population of juniper trees is replaced by poplar trees b) coyotes migrate to an area where no coyotes lived before c) an area receives less rain each year for many years d) the water level in lake ontario peaks and dips every few years

Explain why the plants cortex would serve as the best food source for animals

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.

How does science influence the decisions made about social, economic, and political issues?