1
A variable that affects a population regardless of the number of organisms present in a given area
2
A variable affected by the number of organisms present in a given area
3
a graph showing the number or proportion of individuals surviving to each age for a given species or group.
5
a species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically.
8
an interaction between organisms or species in which both the organisms or species are harmed. Limited supply of at least one resource used by both can be a factor.
11
A relationship between two species in which both species benefit.
