Life science p3 Flashcards
System
a set of things working together as parts of a mechanism or an interconnecting network
Feedback
information about reactions to a product, a person’s performance of a task, etc. which is used as a basis for improvement
Model
a three-dimensional representation of a person or thing or of a proposed structure, typically on a smaller scale than the original
Biosphere
the regions of the surface, atmosphere, and hydrosphere of the earth (or analogous parts of other planets) occupied by living organisms
Ecosystem
a biological community of interacting organisms and their physical environment.
Biome
a large naturally occurring community of flora and fauna occupying a major habitat, e.g. forest or tundra
Organism
an individual animal, plant, or single-celled life form
Population
all the inhabitants of a particular town, area, or country
Biotic Factor
A biotic factor is any living thing that has an effect on an ecosystem.
Abiotic Factor
a nonliving condition or thing, as climate or habitat, that influences or affects an ecosystem and the organisms in it
Community
a group of people living in the same place or having a particular characteristic in common.
Habitat
the natural home or environment of an animal, plant, or other organism
Niche
a comfortable or suitable position in life or employment
Biodiversity
the variety of life in the world or in a particular habitat or ecosystem.
Keystone Species
a species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically
exponential growth
when a population’s per capita growth rate stays the same, regardless of population size, making the population grow faster and faster as it gets larger.
logistic growth
a population’s per capita growth rate gets smaller and smaller as population size approaches a maximum imposed by limited resources in the environment, known as the carrying capacity
carrying capacity
the number or quantity of people or things that can be conveyed or held by a vehicle or container.
density dependent
density-dependent factor, also called regulating factor, in ecology, any force that affects the size of a population of living things in response to the density of the population (the number of individuals per unit area)
density independent
Density independent factors, in ecology, refer to any influences on a population’s birth or death rates, regardless of the population density.
population density
The population density is the number of population per unit of total land area of a country.
emigration
the act of leaving one’s own country to settle permanently in another; moving abroad
disturbance
the interruption of a settled and peaceful condition.
