Which of the following is an impact of an increase in motor vehicles in cities? a. oxygen levels have increased. b. carbon dioxide levels have increased. c. the supply of renewable resources has stopped. d. the supply of nonrenewable resources has become unlimited.

Natural selection acts on populations through a specific trait. which statement must be true about that trait? question 6 options: the trait is passed on genetically to the next generation. the trait has little impact on survival. the trait is the same for all organisms. the trait is resistant to mutations.

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.

Consider the venn diagram of plant reproduction. where in this image, areas a - d, would you insert the picture of the orange lily?