Salvinia molesta, a floating aquatic plant, first entered lake naivasha in kenya when a person's fish ponds flooded. the plant quickly grew, changing the habitat of parts of the lake. this is an example of a problem due to
a.
reintroduction programs
c.
habitat fragmentation
b.
exotic species
d.
edge effect

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.

Scientists discover two populations of mice on either side of a major river. the two populations have almost identical genes but the mice from one side cannot breed with mice from the other. this is most likely because

Which statement is a physical property? becomes moldy quicklyeasy to digestconducts electricity poorlydoes not burn