Two species might have similar skeletal structures that have different functions. what do these types of structures suggest about the relationship between the two species?

During binary fission, what events must occur before the cell splits into two new cells?

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

Facilitated diffusion move large molecules and/or polar molecules across the cell membrane. what does facilitated diffusion use to do this?