Like humans, plants can be negatively affected by overcrowding. Unlike humans, plants cannot get up and move to a new environment or explore how to utilize new resources. This experiment will explore the effects of crowding (population...

Overview of the basic concepts behind evolution, such as gene variation and adaptations.[Free Registration/Login may be required to access all resource tools.]

Population genetics is the study of genetic variation in populations. This simulation allows the user to observe the frequencies of two alleles over time.

Discusses conditions needed for the Hardy-Weinberg Law to hold true and demonstrates calculations involving allelic frequencies to illustrate this principle.

In this What's Up in the Environment? video segment, learn how various indicator species are used to monitor the environmental condition of the Everglades.

Discusses common mutations that occur in the human population and describes the many different types of genetic mutations and their impact.

Take a closer look into the modern view of evolution. This article includes many pieces of evidence, all which support the theory of evolution.

Explains what genetic drift, gene flow, and natural selection are, and compares their differences, two at a time.

This site from the Resilience Alliance provides an in-depth look at mammalian herbivore population patterns in boreal forests. It also discusses man's use of these herbivores.

Part of the National Park Service website, this page provides general info. about the resident bat population, and links to more specific bat info. For the bat enthusiast!

This lesson plan focuses on differences in the amino acid sequence of hemoglobin and myoglobin proteins. They use the number of differences to create a phylogenetic tree.

This lesson plan requires students to analyze DNA restriction maps to determine the differences in the sequence for several primates and humans. They then use the information to create a cladogram.

Describes six levels of organization in the biological world - individual species, population, community, ecosystem, biome, and biosphere.

Abiotic factors vary in the environment and determining the types and numbers of organisms that exist in that environment. Factors which determine the types and numbers of organisms of a species in an ecosystem are called limiting...

This video segment from NOVA: "Cracking the Code of Life" explores the genetic similarities and differences among organisms.

A collection of video lectures introducing beginning biology students to the principles of evolution, ecology, and behavior. The course was taught three times a week for a semester at Yale University. The course discusses concepts of...