Nitrogen is a limiting factor in aquatic ecosystems. Suppose that runoff from a field washes nitrogen rich fertilizer into a pond containing a population of algae. Predict how the fertilizer will affect the carrying capacity of the pond for algae. 

Which of the following conclusions can be drawn

Some tools have graduations to show multiple measurements. for example, a ruler may have graduations for both millimeters and centimeters. when measuring the length of an earthworm, which graduations would allow for the most accurate measurement? millimeters centimeters decimeters meters

People with one sickle cell allele are not likely to get malaria. what is this an example of?