New research from the University of Minnesota upends long-held understanding about how wolves, bears and cougars—three of ...

In evolutionary terms, fitness is defined as an organism's ability to survive and reproduce its genes into the next ...

Competition will occur between organisms in an ecosystem when their niches overlap, they both try to use the same resource and the resource is in short supply. Animals compete for food ...

When an individual directly alters the resource-attaining behavior of other individuals, the interaction is considered interference competition. For example, when a male gorilla prohibits other ...

Our comprehensive search suggests that venom delivery systems fully analogous to those of animals exist among plants, fungi, protists, bacteria, and viruses. Thus, venomous organisms are far more ...

Organisms struggle for the necessities of life; there is competition for resources. Individuals within a population vary in their traits; some of these traits are heritable -- passed on to offspring.

Organisms within an ecosystem are organised into levels. Producer Producers are plants and algae, which photosynthesise. Primary consumer Primary consumers are herbivores, which eat producers ...