During winter, many residents songbirds of the North Temperate Zone travel in mixed-species flocks. Flocking may help these birds find food and maintain a more effective watch for predators. Which of the dispersion patters characterizes the individuals of these birds?
This is an example of what kid of regulation of population size?
Draw a graph below to illustrate this type of regulation of population size. Be sure to label your axes.
-As a country develops from a pre-industrialized economy there is a change in birth rates and death rates which results in a demographic transition. the transition is from high birth and death rates to low birth and death rates as the country's economic system develops. Draw two age structure pyramids. The first age-structure pyramid should reflect a county with high birth rates and low death rates. The second age-structure pyramid should reflect a country that has made the transition to a more industrialized economy with low birth rates and low death rates.