Keyterms

organism

a living thing

biotic factor

Living part of an organism's habitat

birth rate

number of birth in a population

death rate

number of death in a population

photosynthesis

process in which organisms uses water, sunlight, and carbon dioxide to make food

population

all members from one species in one area

predation

organism that kills other organisms for food

predator

the one who does the killing in the predation

prey

organism that has been killed and eaten during predation

parasite

organism that benefits by living i or on a host

population density

number of individual in an area with specific size

paratism

organisim that lives in or on a host and harms it

ecosystem

organisms that live in a particular area

ecology

the study of how living things interact with its habitat

estimate

an approximation of a number

emigration

leaving a population

host

organism that a parasite or virus live in or on

limiting factor

prevents population from increasing

immigration

moving into a population

habitat

environment for an organism that provides the thing needed to survive

niche

role of an organism in a population

symbiosis

a close relationship between two organisms of different species and benefits only one of them

species

group of organisms physically similar and can mate

abiotic factors

nonliving parts of an organism habitat

adaptations

a behavior or physical characteristic that allows an organism to survive

community

all different populations that live together

commensalism

relationship between 2 species one is helped and the other one is not harmed

carrying capacity

longest population an area can support

competition

strugle between organism to survive

mutualism

relationship between 2 organisms, which both benefits from it