Plaque consists of a biofilm, with bacteria carefully arranged in a community. what are the advantages of forming a biofilm?

The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?

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.

This rapid change in species that rarely leaves behind fossil evidence is referred to as