Key Terms (Option D and G) Flashcards
(22 cards)
fundamental niche
potential mode of existence for a species
realized niche
actual mode of existence for a species, due to competition and predation
biomass
total dry organic matter of living organisms or ecosystems
gross production
total amount of organic matter (i.e. “biomass”) produced by plants
net production
amount of organic matter produced by plants after respiration
biomass
total dry organic matter of living organisms or ecosystems
biome
a geographical area with a specific climate and sustains a specific community of plants and animals
biosphere
total of all areas where living things are found
biomagnification
process in which chemical substances become more concentrated at each trophic level
r-strategies
producing many offspring, not caring for much, leaving them to fend for themselves
k-strategies
producing little offspring, caring for each, feed and nurture them
allele frequency
the proportion of an allele within a population
gene pool
the sum total of alleles present in a sexually reproducing population
species
organisms that are able to reproduce and create fertile offspring
half-life
a measure of the time taken for the radioactivity to fall to half its original level
genetic evolution
physical changes in the human genome which become inherited and passed on through sexual reproduction
cultural evolution
changes in human thinking and passed on through social interaction/communication
5 Assumptions made by Hardy-Weinburg Equation
- Large population
- No gene flow
- Random mating
- No mutations
- No natural selection
clade
a group of organisms descending from a single common ancestor and descendants of that ancestor
cladistics
method of classification and analysis of living organisms based on cladograms
analogous structure
different structure, same function (e.g. wings)
homologous structure
same structure, different function (e.g. pentadactyl limbs)
