Biology Unit 8, Vertebrates and Invertebrates

Ectothermic

animals whose body temperatures are regulated by their environment

Endothermic

animals whose body temperatures are kept relatively constant by internal mechanisms

Invasive species

non-native species brought to a new environment, whose introduction is likely to cause harm.

Keystone species

a species in an ecosystem that keeps it balanced

Mutualism

symbiosis that is beneficial to both organisms involved

Parasitism

two different organisms where one benefits at the expense of another, or the other is harmed

Commensalism

two different organisms where one benefits while the other if unaffected

Exponetial

population growth without limits

Logistic

population that grows rapidly, the level out