variation
Threatend Species
Speciation is the best term to describe a new species developing from an existing one.
The term that describes the behaviors between males and females of the same species for the purposes of mating is "courtship". Most animals have a courtship ritual, such as dancing, touching or showing how beautiful they are.
the role of an organism within an ecosystem is known as it's niche. an organism can have more than one niche.
In ecology we use several levels of organization to describe the organisms and habitats of an ecosystem. The level of organization that refers only to members of a certain species in a certain area is the population.
microevolution
microevolution
Evolution happens over a long period of time, so nothing suddenly changes. Unless you're talking about pokemon. I believe you're thinking of divergent evolution.
Species richness
Threatend Species
extinction
Extinction
extinct
commensalism
Threatend Species
Biodiversity
A population