If you were given information to identify an biome, which would be the most helpful?
the number of different species
the stability of the ecosystems
the complexity of the food web
the average temperature and rainfall

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above

Which of the following types of pollution is most responsible for large numbers of deaths worldwide because of unsafe drinking water? (a) nutrient pollution (b) thermal pollution (c) pathogen pollution (d) sediment pollution

What do your cells need to live? a. carbon dioxide b. carbon c. air d. oxygen