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Chapt 18-Life Sci

study guide

How do you define ecology? study of the interactions between organisms and their environment
The living factors within an environment are called? biotic -( animals, plants)
The nonliving factors within an environment are called? abiotic - (water, rocks, light, temperature)
Explain what is an organism a living thing
Explain the differences between a population and a community. A population is a group of organisms of the same species that live in a given area. A community is all the different populations that live in a given area
Give an example of a population. Deer population that live in Southwestern Phillips County
Give an example of a community. Deer, rabbits, plants, grass, humans, coyotes, etc that live in Southwestern Phillips County Kansas
How do you define an ecosystem? a community of organisms and their nonliving environment
A biosphere is what? the part of Earth where life exists
An organism that gets it's energy from the sun. producer
The process of getting energy from the sun. photosynthesis
Organisms that eats other organisms. herbivores, carnivores and omnivores
An organism that eats plants. a herbivore. - Examples: grasshoppers, prairie dogs and bison
An organism that eats consumers. carnivores.- Examples: coyotes, hawks, badgers and owls
An organism that eats both plants and animals. Omnivore. Examples: mice, raccoons, monkeys, turtles, humans
What is a scavenger? Omnivores that eat dead plants and animals. - Example: turkey vulture
What is a decomposer? organisms that get energy by breaking down dead organisms. Examples: bacteria and fungi
Explain the differences between a food web and a food chain. food chain shows how energy in food flows from one organism to another; a food web shows the feeding relationships between organisms in an ecosystem
Describe what an energy pyramid tells a person. The pyramid represents energy. In a community there must be more plants than herbivores and more herbivores than carnivores.
Is there more energy on the top or bottom of an energy pyramid? There is more energy at the bottom of an energy pyramid
Explain the differences between limiting factor and carrying capacity. limiting factor is a resource so scarce that it limits the size of a population; carrying capacity is the largest population that an environment can support at any given time
The resource that causes a population to stop growing is called? limiting factor
The largest population that an environment can support at a given time. carrying capacity
Two or more individuals or populations that use the same resource with in a biosphere are called? competition
An organism that is eaten by another organism? prey
An organism that hunts for and eats another organism? predator
An adaptation that helps an organism blend in with its surroundings. camoflage
An adaptation that warns another organism of danger. warning coloration
Poison or scent that prevents another animals form attacking. defensive chemicals
Define symbiosis. two different organisms live in close association with each other; either helps both, harms one, or helps one at no expense to the other
When two species benefit from a relationship. mutualism
A relationship between two organisms where one benefits and the other is harmed. parasitism
When two species change or adapt at the same time to benefit both species. coevolution
When one organism is not affected and the other benefits, this relationship is called. commensalism
A pollinator is? it carries pollen from one flower to another. Examples: bees, bats, hummingbirds
Created by: msparks



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