Levels of Organization
Name two biotic factors and two abiotic factors.
Biotic: Anything living
example: dog, shark, human, etc
Abiotic: Anything nonliving
example: rocks, sun, water, etc
Compare and Contrast habitat and niche.
A habitat is an area. A niche is the role an organism plays in its environment.
Define if the following are autotrophs or heterotrophs.
a. Human
b. Maple Tree
c. Shark
d. Lily Flower
a. Heterotroph
b. Autotroph
c. Heterotroph
d. Autotroph
Which biome is this?
An area where evaporation occurs at a faster rate than precipitation falls. In spite of dry conditions, support cacti, sage brush, some grasses and bushes, as well as a variety of animals.
Desert
What is a density independent factor? Give an example.
Any factor in the environment that does not depend on population density.
Examples: Hurricane, Pollution, etc
What is a biome?
A biome is a large group of ecosystems that share the same climate and have similar types of biological communities.
What is predation?
The act of one organism consuming another organism for food is predation.
What would happen without Detritivores?
The biosphere would be littered with dead organisms.
Which biome is this?
Located south of the boreal forests. Composed mostly of broad-leaved deciduous trees
Temperate Forest
What is a density dependent factor? Give an example.
Any factor in the environment that depends on population density.
Predation, disease, competition, etc
What is the smallest level of organization?
Organism
What is mutualism?
A relationship between two species that live together and benefit from each other.
What percent is available to the level below in a pyramid of number?
In a pyramid of numbers, the producer has 1,000 energy. How much is available to the primary consumer?
10%
100
Which biome is this?
The fertile soils support a thick cover of grasses. Grazing animals and fires keep it from becoming forests. Have hot summers and cold winters
Grassland
What is the difference between emigration and immigration?
Emigration is organisms leaving a population and immigration is organisms entering a population.
What is the biggest level of organization?
Biome
What is commensalism?
A relationship in which one organism is helped and the other organism is not harmed or helped i
What does a pyramid of number shows?
A pyramid of numbers shows the number of organisms at each trophic level in an ecosystem
Which Biome is this?
Treeless biome with a layer of permanently frozen soil called permafrost beneath the surface. Mosses, lichens, and short grasses can grow in the tundra.
Tundra
What is carrying capacity?
When a population stops growing. Carrying capacity is limited by resources such as water, oxygen, and nutrients.
What are all the levels of organization?
population
communities
organism
ecosystem
biome
What is Parasitism?
A relationship in which one organism benefits and another organism
Why do ecologists prefer to use food webs over food chains?
A food web is a model that shows all the possible feeding relationships in an ecosystem. Food webs give a more accurate picture of how energy flows in an ecosystem than food chains.
Which biome is this?
Have a wet season and a dry season. During the dry season, almost all of the trees drop their leaves to conserve water.
Tropical Seasonal Forest
What is logistic growth rate?
Logistic growth occurs when the population’s growth slows or stops at the population’s carrying capacity.