Populations

Duration: 16

Year Published: 1972

Creator: CENTRON CORP.

Format: 16mm

Color: Color

Sound: sound

Copyright: Registered 20Jan72 · MP22307 (Jan-Jun 1972) Copyright holder: Centron Corp., Inc

Description: Defines population and investigates factors which influence population growth and control in both plants and animals. Illustrates that population growth is dependent upon such forces in the environment as food, shelter, air, and space. Examines how predators, parasites, territorality, and disease, among other things, aid in population control., Defines populations, investigates the social structure of various populations, illustrates the speed of unchecked population growth, and considers the factors that cause a given population to grow or decline.

Complete Record: Defines population and investigates factors which influence population growth and control in both plants and animals. Illustrates that population growth is dependent upon such forces in the environment as food, shelter, air, and space. Examines how predators, parasites, territorality, and disease, among other things, aid in population control., , Defines populations, investigates the social structure of various populations, illustrates the speed of unchecked population growth, and considers the factors that cause a given population to grow or decline. NOTE: Two (or more) records have been merged together to create this data.