IB biology HL: ecological niches B4.2

biological niches

• the role of a species in an ecosystem

• should be exclusive to an organism; if two try to occupy the same one, one gets outcompeted

autotrophs

• produce their own food using inorganic compounds

heterotrophs

• consummer already existing organic mass

what is always needed for life

energy; contrust chemical complexity

sugar

fighting randomness=> requires, therefore releases energy

obligate aerobe/anaerobe

Must be in their respective environment

facultative anaerobe

• can survive without oxygen, but develops faster with oxygen

holozoic nutrition

food is

• ingested

• digested internally

• absorbed and assimulated

• egested ( shitting )`

all animals

mixtrophics

can do everything

all three domain

• eukariota

• prokariota

• archea

archea domain feeding

• can do photosynthesis

• oxidation of carbon compounds

• oxidation of inorganic compounds

saprotrophic

• extracellular digestion

• mostly in funghi, oftentimes decomposesr