Relationships among Organisms

Commensalism, Organism A benefits from Organism B, but not vice versa. 

Mutualism, Organism A and Organism C must have each other to exist 

Protocooperation Organisms B and C both benefit from each other, but they can exist independently. 

FIGURE 12.6 Types of beneficial relationships among organisms. 

FIGURE 12.7 Very rapid growth of a population newly introduced into an environment suitable for its survival, followed by stabilization of numbers around the carrying capacity. This is an idealized picture subject to perturbation by many factors such as predation, disruption of habitat, or disease, and it applies to humans and other organisms. 

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Cladistics Method of classification employing genealogies alone in inferring phylogenetic relationships among organisms (see also Phylogeny). 

In the fourth step, multiple linear regression is used to test the H2 hypothesis of a relationship among organic farming and profitability ... 

Describe how you would infer relationships among organisms from their forms. 

Ecology The study of relationships among organisms and their environment. 

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