B2.1 population ecology & interactions, taxonomy Flashcards
species and populations
Abiotic
Non-Living Factors (climate, nutrients, pH)
biotic
living organisms
habitat
where an organism lives
species
organisms that can interbreed and produce FERTILE OFFSPRING
population
one species, one place, one time
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population interactions
predator, prey, producer, consumer, mutualism, parasitism, pathogen
community
interaction of living things
ecosystem
sustainable environment where geochemical cycles recycle nutrients for life
biosphere
the part of the Earth in which life
exists
the biosphere comprises of…
the soil, where decomposers recycle nutrients
water systems such as lakes and oceans, land and the Air.
classification is usually based on
identifiable physical characteristics.
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classification groups in order
kingdom, phylym, class, order, family, genus, species
the first name is the (1), the second name is the (2)
1: genus (capital letter)
2: species (underlined or italicised)
herbivory
eating plants only
predation
eating animals only
parasitism
One Benefits Host is Harmed
mutualism
both benefit
disease
caused by a pathogen
for… 4/5
competition
space, water, food (or light), mates in animals
selection pressures
external factors that may limit a population’s ability to thrive
interspecific
competition between species
intraspecific
competition between members of the same species
the 5 kingdoms are…
protists, animals, plants, fungi, bacteria
taxonomy
science of classifying organisms in to the existing natural classification system
dichotomous key
used to identify an organism based on physical features
what must a dichotomous key contain?
- yes/no questions
- relation to visible features (in an image)
- no subjective questions
what do taxonomists do?
classify and identify species using large collections of specimens and comparing DNA
