Biology second quiz

biotic factor

living components of an ecosystem that shape their environment. ( ex. animals)

abiotic factors

non living components of an ecosystem that influence living organisms ( sunlight)

autotroph

organism that produces its own food (photosynthesis - ex. green plants)

heterotroph

organism that eats other organisms for energy. ( animals)

organism

single living being ( 1 on the ecological organization)

population

group of individuals of the same species living in a specific area (2 on the ecological organization)

community

all different populations that live and interact in a particular area. (3 on the ecological organization)

ecosystem

the community of living organisms interacting with their non living environments (4 on the ecological organization)

Biome

a large geographical area characterized by specific climate conditions, plants, and animals (5 on the ecological organization)

Biosphere

The global sum of all ecosystems; all areas of Earth where life exists, including land, water, and the atmosphere. (6 on the ecological organization)

symbiotic relationships between organisms in an environment

long-term interactions between different species in an ecosystem, classified primarily as mutualism (both benefit), commensalism (one benefits, one unaffected), or parasitism (one benefits, one harmed)

energy flow in an ecosystem

one-way, non-cyclic path, typically starting with sunlight and moving upward through trophic levels.

genetic drift

random fluctuation in alleles in a population do to chance over time

natural selection