Science - 2018-19

LS.7 - Interactions Among Populations

The student will investigate and understand that interactions exist among members of a population. Key concepts include

a) competition, cooperation, social hierarchy, territorial imperative; and

b) influence of behavior on a population.

Bloom's Levels:  Analyze; Understand

Adopted: 2010


  • Organisms are diverse, yet share similar characteristics.
  • Life can be organized into a functional and structural hierarchy.

  • I can explain why some animals fight with one another.
  • I can explain why some animals travel together and others do not.


  • Individual members of a population interact with each other. These interactions include competing with each other for basic resources, mates, territory, and cooperating with each other to meet basic needs.
  • The establishment of a social order in a population may ensure that labor and resources are adequately shared.
  • The establishment of a territory ensures that members of a population have adequate habitat to provide for basic resources.
  • Individual behaviors and group behaviors can influence a population.
  • Animals exhibit needs for food, water, gases, shelter and space for which they compete. These needs may often be met in a range of conditions. Too much may be as harmful as too little (e.g., too much food or too little water).


In order to meet this standard, it is expected that students will

a)  categorize behaviors as examples of competition, cooperation, social hierarchy, or territorial imperative.

a, b)  differentiate between the needs of the individual and the needs of a population.

interpret, analyze, and evaluate data from systematic studies and experiments concerning the interactions among members of a population.

determine the relationship between a population’s position in a food web and the types of interactions seen among the individuals of the population.

observe and identify populations in ecosystems and collect, record, chart, and interpret data concerning the interactions of these organisms (from observations and print and electronic resources). 


population, community, cooperation, competition, symbiotic relationship, mutualism, commensalism, parasitism, niche, predator, prey, social hierarchy, territorial imperative, limiting factors, carrying capacity

Updated: Jun 29, 2018