Davidson High-9Th Grade Biology

Front 1

Ecology

Back 1

the study of interactions that take place between organisms and their environment

Front 2

Biosphere

Back 2

the portion of Earth that supports living things

Front 3

Abiotic Factors

Back 3

the nonliving parts of an organism's environment

Front 4

Biotic factors

Back 4

all living organisms that inhabit an environment

Front 5

Population

Back 5

a group of organisms all of the same species, which interebreed and live in the same area at the same time

Front 6

Biological Community

Back 6

made up of interacting populations in a certain area at a certain time

Front 7

Ecosystem

Back 7

made up of interacting populations in a biological community and the community's abiotic factors

Front 8

Habitat

Back 8

the place where an organism lives out its life

Front 9

Niche

Back 9

all strategies and adaptations a species uses in its environment-how it meets its specific needs for food and shelter, how and whre it survives and where it reproduces

Front 10

Symbiosis

Back 10

the relationship in which there is a close and permanent association between organisms of different species

Front 11

Mutualism

Back 11

a symbiotic relationship in which both species benefits

Front 12

Commensalism

Back 12

a symbiotic relationship in which one species benefits and the other species is neither harmed nor benefited

Front 13

Parasitism

Back 13

a symbiotic relationship in which a memeber of one species derives benefit at the expense of another species (the Host)

Front 14

autotroph

Back 14

an organism that uses light energy or energy stored in chemical compounds to make energy rich compounds

Front 15

Heterotroph

Back 15

an organism that cannot make its own food and feeds on other organisms

Front 16

decomposers

Back 16

breakdown the complex compounds of dead and decaying plants and animals into simpler molecules that can be more easily absorbed

Front 17

food chain

Back 17

a simple model that scientists use to sow how matter and enrgy move through an ecosystem

Front 18

trophic level

Back 18

each organism in a food chain represents a feeding step

Front 19

food web

Back 19

model that shows all the possible feeding relationship at each trophin level in a community

Front 20

biomass

Back 20

the total weight of living matter at each trophic level