Unit B Sean and Vanja Flashcards
What is in topsoil?
Mostly organic with small amounts of rock
What is in topsoil?
Mostly organic with small amounts of rock
What is ecology?
The study of an ecosystem.
What is an Ecotone?
Transition area that contains species from bordering ecosystems
What is a niche?
Role, place in food web, habitat. Breeding
Name 4 terrestrial biomes
Tundra, taiga, deciduous forest, grassland
What is the limnetic zone?
The middle of lake that gets sunlight
Which biome has the most precipitation?
Deciduous forest, tiaga, muskeg, grassland
More nutrients towards the too or the bottom of soil layers
Top
What is the main factors that affects sunlight?
Latitude
What are the layers of a lake?
Epilimnion
Thermocline
Hypolimnion
4 factors of biotic potential?
Birth potential
Capacity for survival
Breeding frequency
Length of reproductive life
Ex. Of abiotic and biotic limiting factors?
Too much or too little light
Not enough food
Define Law of Minimum
The nutrient in least supply limits growth
Eg. Of density dependant and independent factors
Independent: flood
Dependant: disease
What is eutrophication?
High nutrient level in a lake
Eventually all lakes dry up
What is taxonomy?
The science of classifying organisms.
What are the parts of a binomial nomenclature?
Genus
Species
Advantages of binomial nomenclature?
Common language for all scientists
Identifying organisms
7 main levels of taxa?
Kingdom Phyla Class Order Family Genus Species
What is phylogeny?
History of the evolution of a species
What is biogeography?
The study of the biological distribution of life earth
Define endemic
Species that is found in only one location
Homologous feature?
Similar structure, different function
Analogous feature?
Same structure, different origin
3 types of mutation
Loss of a entire section of DNA
duplication of section
Changes to sequence
Example of beneficial mutation?
Larger heart for better blood flow
Define speciation?
The formation of a new species
What is allopatric speciation?
Speciation by reproductive isolation
Theory of gradualism?
Idea that speciation occurs slowly
Theory of punctuated equilibrium?
Idea that species evolve rapidly followed by little change
