Damon has been terminally ill with multiple fractures to his skull. he has been in a vegetative state for over three years. finally, his family agrees to end his suffering by removing him from the life-support system. this is an example of euthanasia.

Cells destroy body cells infected by a virus or bacteria.

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.

Diagram of the evolution of land plants?